Method for regulating and controlling light-emitting direction
By constructing a three-dimensional photonic crystal model on the surface of perovskite scintillator and performing simulation, the propagation limitation of two-dimensional photonic crystals in the vertical direction is solved, precise regulation of the light emission direction and the improvement of light extraction efficiency are achieved, and the application of nuclear detection and other high-precision optical devices is promoted.
Patent Information
- Application Number
- CN202510252893.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2025-07-29
AI Technical Summary
The existing two-dimensional photonic crystals have limitations in the light propagation direction and cannot effectively control the light propagation in the vertical direction, resulting in low diffraction loss and photon capture efficiency.
A three-dimensional photonic crystal model was constructed on the surface of perovskite scintillators, and simulated by Monte Carlo ray tracing method, adjusting the diameter and refractive index of the microspheres to accurately regulate the light emission direction.
Accurate control of the light emission direction, reduce diffraction loss, improve the light extraction efficiency and the performance of the detection system, especially the light emission direction control in the range of 0 to 40°, and improve the photon detection efficiency.
Smart Images
Figure CN120386049A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the fields of micro-nano optics and nuclear detection technology, and particularly relates to a method for regulating the emission direction. Background Art
[0002] Photonic crystals are artificial materials with periodic microstructures that can control the propagation of light within a specific frequency range. As a typical type of photonic crystal, two-dimensional photonic crystals (2D PhCs) have been widely studied and applied. They can regulate the propagation direction of light through the photonic bandgap effect and have made significant progress in fields such as optical communication and nuclear detection. However, two-dimensional photonic crystals can only guide light propagation through the surface, and their bandgap structures are only effective for in-plane light propagation and cannot effectively control the light propagation in the z-direction perpendicular to the surface. This limits the practical applications of two-dimensional photonic crystals.
[0003] In the prior art, some studies have attempted to improve their regulation effects by optimizing the structures of two-dimensional photonic crystals. However, due to their limitations, diffraction losses often cannot be completely avoided. For example, although in some studies, two-dimensional photonic crystals can regulate the emission direction, due to their surface limitations, there are certain directional deviations in the regulation effects and precise control cannot be achieved within all angular ranges. More importantly, in practical applications, especially in photon detection systems, due to the uncontrollability of the light propagation direction, effective photon capture and efficient detection cannot be achieved with two-dimensional photonic crystals.
[0004] To address the above problems, three-dimensional photonic crystals (3D PhCs) have become an ideal solution due to their full three-dimensional (3D) bandgap structures. Compared with two-dimensional photonic crystals, three-dimensional photonic crystals can precisely regulate the light propagation path in all directions in space, thus significantly enhancing the light regulation ability, especially for the regulation in the vertical direction. Based on the bandgap effect of three-dimensional photonic crystals, effective light regulation can be achieved within a wider angular range, avoiding the problem of limited light propagation in the vertical direction of two-dimensional photonic crystals and effectively reducing the diffraction losses caused by inaccurate light propagation directions.
[0005] Nevertheless, the application of three-dimensional photonic crystals still faces some technical challenges, especially in terms of material and structure design. Summary of the Invention
[0006] In view of this, this application provides a method for regulating the emission direction, thereby enabling precise regulation of the emission direction.
[0007] The technical solution of this application is specifically implemented as follows:
[0008] A method for regulating the emission direction, the method comprising:
[0009] Construct a corresponding three-dimensional photonic crystal model on the surface of the perovskite scintillator;
[0010] Determine the optical dispersion relationship and surface characteristics of the surface of the perovskite scintillator;
[0011] Use the Monte Carlo ray tracing method for simulation to obtain the far-field intensity distribution in the light emission direction;
[0012] According to the far-field intensity distribution in the light emission direction, adjust the diameter and refractive index of the microspheres in the three-dimensional photonic crystal model to control the light emission direction.
[0013] Preferably, the constructing a corresponding three-dimensional photonic crystal model on the surface of the perovskite scintillator includes:
[0014] Model the perovskite scintillator and the three-dimensional photonic crystal disposed on the surface of the perovskite scintillator to determine the shapes and relative positions of the perovskite scintillator and the three-dimensional photonic crystal;
[0015] Set each simulation parameter in the model;
[0016] Set the simulation calculation region in the model;
[0017] Set the calculation accuracy parameter;
[0018] Perform simulation according to the simulation parameters, simulation calculation region, and calculation accuracy parameter to construct a corresponding three-dimensional photonic crystal model.
[0019] Preferably, the constructing a corresponding three-dimensional photonic crystal model further includes:
[0020] Use the coupled-wave analysis method to calculate the surface dispersion relationship of the perovskite scintillator with a three-dimensional photonic crystal structure, determine the optical dispersion relationship of the three-dimensional photonic crystal, and construct a corresponding three-dimensional photonic crystal model.
[0021] Preferably, the three-dimensional photonic crystal model includes: a first layer, a second layer, and a third layer;
[0022] The first layer is polystyrene microspheres arranged in a hexagonal pattern on the perovskite plane, presenting a honeycomb structure;
[0023] The second layer is a planar layer formed by polystyrene microspheres placed at the pore positions of the first layer;
[0024] The third layer is polystyrene microspheres arranged in a hexagonal pattern on the second layer, presenting a honeycomb structure;
[0025] The refractive index of the polystyrene microspheres in the first layer is the first refractive index;
[0026] The refractive index of the polystyrene microspheres in the second layer is the second refractive index.
[0027] Preferably, the first refractive index is: 1.59;
[0028] The second refractive index is: 1.7, 1.9, 2.1, 2.3, 2.5 or 2.7.
[0029] Preferably, the determination of the light dispersion relationship and surface characteristics of the perovskite scintillator surface includes:
[0030] Calculating the dispersion relationship of light with a specific wavelength on the surface of the perovskite scintillator with a three-dimensional photonic crystal model to obtain a bidirectional scattering distribution function for characterizing the interface properties of the perovskite scintillator.
[0031] Preferably, the use of the Monte Carlo ray tracing method for simulation to obtain the far-field intensity distribution in the light emission direction includes:
[0032] Modeling the scintillation detection system to construct a scintillation detection system model;
[0033] According to the light dispersion relationship and surface characteristics of the perovskite scintillator surface, performing simulation through the Monte Carlo ray tracing method to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
[0034] Preferably, the modeling of the scintillation detection system to construct a scintillation detection system model, and according to the light dispersion relationship and surface characteristics of the perovskite scintillator surface, performing simulation through the Monte Carlo ray tracing method to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model includes:
[0035] Modeling the scintillation detection system to construct a scintillation detection system model;
[0036] Setting the material and interface properties in the scintillation detection system model;
[0037] Setting a light source in the scintillation detection system model;
[0038] Setting the ray tracing parameters;
[0039] Setting a detector in the scintillation detection system model;
[0040] According to the light dispersion relationship and surface characteristics of the perovskite scintillator surface, performing simulation through the Monte Carlo ray tracing method in the scintillation detection system model to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
[0041] Preferably, the use of the Monte Carlo ray tracing method for simulation includes:
[0042] Through the user-defined optical property function in the advanced physical module of the first simulation software, substitute the bidirectional scattering distribution function used to characterize the interface properties of the perovskite scintillator, and define it as the interface property of the surface of the same scintillator structure in the first simulation software, and perform Monte Carlo ray tracing simulation.
[0043] Preferably, in the scintillation detection system, set the preset wavelength as the working wavelength of the perovskite scintillator, preset the crystal size of the perovskite scintillator, and set the light source as a volume light source with a preset size.
[0044] As can be seen above, in the method for regulating the light emission direction in this application, since a corresponding three-dimensional photonic crystal model is constructed on the surface of the perovskite scintillator, and the Monte Carlo ray tracing method is used for simulation, the far-field intensity distribution of the light emission direction is obtained, and the angles with the strongest light emission are obtained; then, according to the far-field intensity distribution of the light emission direction, the refractive index and diameter of the microspheres in the three-dimensional photonic crystal model are adjusted, and the microsphere diameter and refractive index in the three-dimensional photonic crystal model are continuously optimized, so that precise regulation of the light emission direction can be achieved. Description of the Drawings
[0045] Figure 1 It is a schematic flowchart of the method for regulating the light emission direction in a specific embodiment of this application.
[0046] Figure 2 It is a schematic diagram of constructing a three-dimensional photonic crystal model in a specific embodiment of this application.
[0047] Figure 3 It is a schematic diagram of the simulation result of the Monte Carlo ray tracing method in a specific embodiment of this application Figure 1 。
[0048] Figure 4 It is a schematic diagram of the simulation result of the Monte Carlo ray tracing method in a specific embodiment of this application Figure 1 。 Detailed Embodiments
[0049] To make the technical solutions and advantages of this application clearer, the following further elaborates on this application in detail in combination with the drawings and specific embodiments.
[0050] Figure 1 It is a schematic flowchart of the method for regulating the light emission direction in an embodiment of this application. As Figure 1 shown, the method for regulating the light emission direction in the embodiment of this application includes the following steps:
[0051] Step 101, construct a corresponding three-dimensional photonic crystal model on the surface of the perovskite scintillator.
[0052] In the technical solution of the present application, a corresponding three-dimensional photonic crystal model will be first constructed on the surface of the perovskite scintillator, so that the optical modes of the corresponding three-dimensional photonic crystal can be directly set on the surface of the perovskite scintillator.
[0053] In the technical solution of the present application, the corresponding three-dimensional photonic crystal model can be constructed in a variety of specific implementation manners.
[0054] For example, as an example, in a specific embodiment of the present application, the construction of the corresponding three-dimensional photonic crystal model on the surface of the perovskite scintillator may include:
[0055] Step 11: Model the perovskite scintillator and the three-dimensional photonic crystal disposed on the surface of the perovskite scintillator to determine the shapes and relative positions of the perovskite scintillator and the three-dimensional photonic crystal.
[0056] Step 12: Set each simulation parameter in the model.
[0057] For example, as an example, in a specific embodiment of the present application, the simulation parameters may include: the refractive index of the scintillator, the polarization direction and propagation direction of the incident light, the working wavelength, etc.
[0058] Step 13: Set the simulation calculation region in the model.
[0059] For example, as an example, in a specific embodiment of the present application, a wireframe of a preset color may be used in the model to represent the simulation calculation region. According to Bloch's theorem, the simulation calculation region is generally set as one period of the periodic structure.
[0060] Step 14: Set the calculation accuracy parameters.
[0061] For example, as an example, in a specific embodiment of the present application, the calculation accuracy parameters may include: the number of layers for dividing the simulation calculation region, the convergence order (the number of terms retained after the Fourier expansion of the dielectric constant for each layer), etc.
[0062] Step 15: Perform simulation according to the simulation parameters, the simulation calculation region, and the calculation accuracy parameters to construct the corresponding three-dimensional photonic crystal model.
[0063] In addition, after constructing the three-dimensional photonic crystal model, the simulation result data can be saved in text format.
[0064] Therefore, through the above Steps 11 to 15, a corresponding three-dimensional photonic crystal model can be constructed on the surface of the perovskite scintillator, as Figure 2 shown.
[0065] Additionally, as an example, in a specific embodiment of the present application, the constructing of the corresponding three-dimensional photonic crystal model may further include: selecting an appropriate perovskite scintillator (e.g., (PEA)2PbBr4) as the substrate, using the Rigorous Coupled-Wave Analysis (RCWA) method to calculate the surface dispersion relation of the perovskite scintillator with a three-dimensional photonic crystal structure, determining the optical dispersion relation of the three-dimensional photonic crystal, and constructing the corresponding three-dimensional photonic crystal model, so as to obtain the optical properties of the perovskite surface for growing the three-dimensional photonic crystal.
[0066] The RCWA method can calculate the reflection and refraction characteristics during the light propagation process based on the refractive index and geometric parameters of the crystal, and obtain the propagation mode of photons. Therefore, through the RCWA method, the optical dispersion relation of each layer can be obtained, facilitating subsequent Monte Carlo ray tracing simulations, determining the propagation mode, reflection, and refraction characteristics of light in the three-dimensional photonic crystal, and further optimizing the design of the three-dimensional photonic crystal.
[0067] Additionally, as an example, in a specific embodiment of the present application, the three-dimensional photonic crystal model may include: a first layer, a second layer, and a third layer;
[0068] The first layer is polystyrene (PS) microspheres arranged in a hexagonal pattern on the perovskite plane, presenting a honeycomb structure;
[0069] The second layer is a planar layer formed by PS microspheres placed at the pore positions of the first layer;
[0070] The third layer is PS microspheres arranged in a hexagonal pattern on the second layer, presenting a honeycomb structure;
[0071] The refractive index of the PS microspheres in the first layer is the first refractive index;
[0072] The refractive index of the PS microspheres in the second layer is the second refractive index.
[0073] In the technical solution of the present application, the values of the above-mentioned first refractive index and second refractive index can be preset according to the needs of the actual application scenario.
[0074] For example, as an example, in a specific embodiment of the present application, the first refractive index may be: 1.59; the second refractive index may be: 1.7, 1.9, 2.1, 2.3, 2.5, or 2.7.
[0075] Additionally, as an example, in a specific embodiment of the present application, the perovskite scintillator may be (PEA)2PbBr4, the wavelength may be 432 nm, and the size may be 6×6 μm. Since it is a periodic structure, the model size is irrelevant.
[0076] Step 102: Determine the light dispersion relationship and surface characteristics of the perovskite scintillator surface.
[0077] In the technical solution of this application, it is also necessary to determine the light dispersion relationship and surface characteristics of the perovskite scintillator surface.
[0078] For example, as an example, in a specific embodiment of this application, step 102 may include:
[0079] Calculate the dispersion relationship of light with a specific wavelength (for example, a wavelength of 432 nm) on the surface of the perovskite scintillator with a three-dimensional photonic crystal model (for example, it can be calculated using software such as Rsoft), and obtain the bidirectional scattering distribution function (BSDF, Bidirectional scattering distribution function) for characterizing the interface properties of the perovskite scintillator, providing data support for the Monte Carlo ray tracing simulation in subsequent steps.
[0080] Step 103: Use the Monte Carlo ray tracing method for simulation to obtain the far-field intensity distribution in the light emission direction.
[0081] In the technical solution of this application, the Monte Carlo ray tracing method can be used to further simulate the system to obtain the far-field intensity distribution in the light emission direction, so that the angles with the strongest light emission can be obtained.
[0082] For example, as an example, in a specific embodiment of this application, a scintillation detection system can be modeled to construct a scintillation detection system model; according to the light dispersion relationship and surface characteristics of the perovskite scintillator surface, simulation is carried out by the Monte Carlo ray tracing method to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
[0083] For another example, as an example, in a specific embodiment of this application, the modeling of the scintillation detection system, constructing the scintillation detection system model, and according to the light dispersion relationship and surface characteristics of the perovskite scintillator surface, simulation is carried out by the Monte Carlo ray tracing method to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model may include:
[0084] Step 21: Model the scintillation detection system to construct a scintillation detection system model.
[0085] In this step, the scintillation detection system will be modeled to construct the corresponding scintillation detection system model.
[0086] For example, as an illustration, in a specific embodiment of the present application, when modeling a scintillation detection system, parameters such as the shape of the light source, the size and shape of the scintillator can be set.
[0087] Step 22, set the material and interface properties in the scintillation detection system model.
[0088] For example, as an illustration, in a specific embodiment of the present application, the values of parameters such as refractive index, absorption, and reflection can be set in the scintillation detection system model.
[0089] Step 23, set the light source in the scintillation detection system model.
[0090] For example, as an illustration, in a specific embodiment of the present application, parameters such as the energy and wavelength of the light source can be set in the scintillation detection system model.
[0091] Step 24, set the ray tracing parameters.
[0092] For example, as an illustration, in a specific embodiment of the present application, the ray tracing parameters may include: parameters such as the number of rays and the relative power threshold.
[0093] Step 25, set the detector in the scintillation detection system model.
[0094] For example, as an illustration, in a specific embodiment of the present application, parameters such as the position, radius, and regional division accuracy of the detector can be set in the scintillation detection system model.
[0095] Step 26, according to the light dispersion relationship and surface characteristics of the perovskite scintillator surface, perform simulation through the Monte Carlo ray tracing method in the scintillation detection system model to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
[0096] Through the above steps 21 to 26, simulation can be performed through the Monte Carlo ray tracing method to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
[0097] In addition, as an illustration, in a specific embodiment of the present application, the simulation using the Monte Carlo ray tracing method may include:
[0098] Through the user-defined optical property function in the advanced physics module of the first simulation software (for example, LightTools software), substitute the BSDF function used to characterize the interface properties of the perovskite scintillator, define it as the interface properties of the surface of the same scintillator structure in the first simulation software (for example, LightTools software), and perform Monte Carlo ray tracing simulation.
[0099] In the technical solution of the present application, after light is emitted from the perovskite scintillator substrate, through the regulation of the three-dimensional photonic crystal, the path and energy distribution of each ray after passing through the surface of the three-dimensional photonic crystal are calculated. Finally, the far-field intensity distribution of the light emission direction can be obtained through simulation. For example, Figure 3 and Figure 4 show the propagation path and far-field intensity distribution of light after passing through the three-dimensional photonic crystal.
[0100] Define the light source of the perovskite crystal and the surface characteristics of the photonic crystal. In the Monte Carlo ray tracing method, by setting the position of the light source and the propagation path of the light ray, the process of the light ray passing through the surface of the photonic crystal is simulated. The path and energy of each light ray are calculated, and finally the far-field intensity distribution is obtained.
[0101] In the technical solution of the present application, a scintillation detection system is modeled and simulated based on the Monte Carlo ray tracing method. In the simulation, the BSDF function is defined as the interface property of the perovskite structure surface, and the path and energy of the light ray after passing through the interface are calculated, so as to realize the simulation of the far-field intensity distribution of the light emitted by the perovskite in the scintillation detection system. In this process, the surface optical characteristics of the perovskite material are simulated, the path and energy distribution of the light ray after passing through the interface are considered, and the far-field intensity distribution of the photonic crystal is simulated.
[0102] In addition, as an example, in a specific embodiment of the present application, in order to be closer to the real situation, a preset wavelength (for example, 432 nm) can be set as the working wavelength of the perovskite scintillator (for example, (PEA)2PbBr4) in the scintillation detection system, the crystal size of the perovskite scintillator can be preset (for example, it can be set to Φ20 mm × 2 mm), and the light source can be set as a volume light source with a preset size (for example, Φ20 mm × 1 mm).
[0103] In addition, as an example, in a specific embodiment of the present application, in order to prevent stray light from the unmanufactured photonic crystal surface from entering the detector receiving area, a baffle can also be set around the perovskite scintillator, and an opening with a preset size (for example, the size is 8 mm × 8 mm) can be set in the center of the baffle on the side where the three-dimensional photonic crystal is manufactured, so that the emitted light can enter the receiver in the external space and can be effectively captured by the receiver; the total number of light rays in the perovskite scintillator can also be set to a preset number (for example, 3 million), and the power threshold of any light ray can be set to 1%, which means that when the power drops below 1% of the original energy of its light, this light ray will be discarded.
[0104] Step 104, according to the far-field intensity distribution of the light emission direction, adjust the diameter and refractive index of the microspheres in the three-dimensional photonic crystal model to regulate the light emission direction.
[0105] In the technical solution of the present application, the diameter of the microspheres in the three-dimensional photonic crystal model and the refractive index of the microspheres in the second layer can be adjusted accordingly according to the obtained far-field intensity distribution of the light emission direction, and the influence on the light output direction can be analyzed to optimize the structure and optical properties of the three-dimensional photonic crystal, so that the light emission direction can be adjusted accordingly and the light output direction can be precisely controlled.
[0106] For example, as an example, in a specific embodiment of the present application, the diameter of the microspheres in the three-dimensional photonic crystal model can be set to corresponding values.
[0107] For example, microspheres with different diameters (for example, the diameter can be 300 nm, 400 nm, 500 nm, 600 nm, etc.) can be set in the three-dimensional photonic crystal model.
[0108] Again, for example, as an example, in a specific embodiment of the present application, the refractive index of the microspheres in the three-dimensional photonic crystal model can be set to corresponding values.
[0109] For example, microspheres with different refractive indices (for example, the refractive index can be between 1.7 and 2.7, etc.) can be set in the three-dimensional photonic crystal model.
[0110] Through the above steps 101 to 104, the light emission direction of the perovskite scintillator can be adjusted accordingly, and the light output direction can be precisely controlled.
[0111] In the technical solution of the present application, by growing a photonic crystal on the surface of the scintillator and relying on the coupling effect between the evanescent field formed at the interface by the scintillation light and the photonic crystal, the scintillation light that was originally totally reflected can be effectively extracted, thereby obtaining a significant enhancement in light output.
[0112] In the technical solution of the present application, since a corresponding three-dimensional photonic crystal model is constructed on the surface of the perovskite scintillator and the Monte Carlo ray tracing method is used for simulation to obtain the far-field intensity distribution of the light emission direction and obtain the angles with the strongest light emission; then, according to the far-field intensity distribution of the light emission direction, the refractive index and diameter of the microspheres in the three-dimensional photonic crystal model are adjusted, and the diameter and refractive index of the microspheres in the three-dimensional photonic crystal model are continuously optimized, so that precise control of the light emission direction can be achieved. For example, the adjustment range of the light emission direction can cover 0 to 40°, enabling precise control of the light emission direction within the range of 0 to 40°, ensuring that the light can be emitted along the direction of the detector window. Thus, not only the propagation limitation of two-dimensional photonic crystals in the vertical direction in the prior art is overcome, but also the adjustment accuracy of the light emission direction is significantly improved, the light extraction efficiency in the light detection system is optimized, and the light detection efficiency is increased.
[0113] The simulation results show that by reasonably designing the structure of the three-dimensional photonic crystal, the diffraction loss of light can be effectively reduced, the light extraction efficiency can be optimized, and the overall performance of the light detection system can be improved.
[0114] Compared with the two-dimensional photonic crystal in the prior art, the three-dimensional photonic crystal structure proposed in this application has the following advantages:
[0115] 1) Fully three-dimensional bandgap structure: The three-dimensional photonic crystal can accurately control the propagation of light in all directions in space, can effectively propagate light in the vertical direction (z direction), breaking through the limitation that the two-dimensional photonic crystal in the prior art can only propagate in the plane. It can significantly reduce the diffraction loss caused by inaccurate light propagation direction, and can effectively improve the light extraction efficiency, ensuring that more light can be effectively received by the detector.
[0116] 2) Precise control of the light emission direction: By precisely adjusting the diameter of the microspheres in the three-dimensional photonic crystal and the refractive index of the second layer of microspheres, the technical solution of this application can achieve precise control of the light emission direction within a wide angular range (0 to 40°), especially can control the light to emit along the direction of the detector window, thereby improving the photon detection efficiency and processing ability.
[0117] 3) Improvement of actual application performance: The technical solution of this application can provide a more accurate means of light extraction and emission direction control for optical systems such as optical detectors, thereby effectively increasing the photon capture rate and reducing unnecessary light loss.
[0118] The technical solution of this application can not only improve the performance of perovskite in the detection system through the three-dimensional photonic crystal, but also provide a theoretical basis and technical support for the application of the three-dimensional photonic crystal in nuclear detection, lasers, optical imaging and other high-precision optical devices, promoting the technological progress in related fields, and having significant scientific significance and commercial application value.
[0119] The above are only the preferred embodiments of this application, and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the scope of protection of this application.
Claims
1. A method for regulating the light emission direction, characterized in that The method includes: Constructing a corresponding three-dimensional photonic crystal model on the surface of the perovskite scintillator; Determining the optical dispersion relationship and surface characteristics of the surface of the perovskite scintillator; Performing simulation using the Monte Carlo ray tracing method to obtain the far-field intensity distribution in the light emission direction; Adjusting the diameter and refractive index of the microspheres in the three-dimensional photonic crystal model according to the far-field intensity distribution in the light emission direction to control the light emission direction.
2. The method according to claim 1, wherein The constructing a corresponding three-dimensional photonic crystal model on the surface of the perovskite scintillator includes: Modeling the perovskite scintillator and the three-dimensional photonic crystal disposed on the surface of the perovskite scintillator to determine the shapes and relative positions of the perovskite scintillator and the three-dimensional photonic crystal; Setting various simulation parameters in the model; Setting a simulation calculation region in the model; Setting calculation accuracy parameters; Performing simulation according to the simulation parameters, the simulation calculation region, and the calculation accuracy parameters to construct a corresponding three-dimensional photonic crystal model.
3. The method according to claim 2, characterized in that, The constructing a corresponding three-dimensional photonic crystal model further includes: Calculating the surface dispersion relationship of the perovskite scintillator with a three-dimensional photonic crystal structure using the coupled-wave analysis method to determine the optical dispersion relationship of the three-dimensional photonic crystal, and constructing a corresponding three-dimensional photonic crystal model.
4. The method according to claim 3, wherein The three-dimensional photonic crystal model includes: a first layer, a second layer, and a third layer; The first layer is polystyrene microspheres arranged in a hexagonal pattern on the perovskite plane, presenting a honeycomb structure; The second layer is a planar layer formed by polystyrene microspheres placed at the pore positions of the first layer; The third layer is polystyrene microspheres arranged in a hexagonal pattern on the second layer, presenting a honeycomb structure; The refractive index of the polystyrene microspheres in the first layer is the first refractive index; The refractive index of the polystyrene microspheres in the second layer is the second refractive index.
5. The method according to claim 4, wherein The first refractive index is: 1.59; The second refractive index is: 1.7, 1.9, 2.1, 2.3, 2.5 or 2.
7.
6. The method according to claim 1, wherein The determining the optical dispersion relationship and surface characteristics of the surface of the perovskite scintillator includes: Calculating the dispersion relationship of light with a specific wavelength on the surface of the perovskite scintillator with a three-dimensional photonic crystal model to obtain a bidirectional scattering distribution function for characterizing the interface properties of the perovskite scintillator.
7. The method according to claim 1, wherein The performing simulation using the Monte Carlo ray tracing method to obtain the far-field intensity distribution in the light emission direction includes: Modeling the scintillation detection system to construct a scintillation detection system model; Performing simulation by the Monte Carlo ray tracing method according to the optical dispersion relationship and surface characteristics of the surface of the perovskite scintillator to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
8. The method according to claim 7, wherein The modeling the scintillation detection system to construct a scintillation detection system model, performing simulation by the Monte Carlo ray tracing method according to the optical dispersion relationship and surface characteristics of the surface of the perovskite scintillator to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model includes: Modeling the scintillation detection system to construct a scintillation detection system model; Setting the material and interface properties in the scintillation detection system model; Set a light source in the scintillation detection system model; Set ray tracing parameters; Set a detector in the scintillation detection system model; According to the light dispersion relationship and surface characteristics on the surface of the perovskite scintillator, perform simulation in the scintillation detection system model by Monte Carlo ray tracing method to obtain the far-field intensity distribution of the light emitted by the scintillator in the scintillation detection system model.
9. The method according to claim 8, wherein The simulation using the Monte Carlo ray tracing method includes: Through the user-defined optical property function in the advanced physics module of the first simulation software, substitute the bidirectional scattering distribution function used to characterize the interface properties of the perovskite scintillator, and define it as the interface property of the surface of the same scintillator structure in the first simulation software, and perform Monte Carlo ray tracing simulation.
10. The method according to claim 9, wherein: In the scintillation detection system, set the preset wavelength as the working wavelength of the perovskite scintillator, preset the crystal size of the perovskite scintillator, and set the light source as a volume light source with a preset size.