Optical JK trigger device based on superstructure

Abstract

The invention provides an optical JK trigger device based on a superstructure, which is suitable for realizing optical coding in a specific frequency band and realizing the function of a JK trigger. A substrate of the device is made of silicon (Si), an input port is composed of lithium niobate (LiNbO3), an output port is composed of silicon nitride (Si3N4), a temperature control port is composed of barium tungstate (BaWO4), a chemical potential control port is composed of aluminum nitride (AlN), a main body key part adopts a symmetrical super-structure with double-sided characteristics, and different transmission peaks can be generated under the condition of different electromagnetic wave incident angles. The symmetrical super-structure with the double-sided characteristic comprises an upper substrate, a lower substrate, a left substrate, a right substrate, an aerogel layer, a plasma thin film layer and a vanadium dioxide (VO2) thin film layer. In a frequency band of 49 GHz-51 GHz, coding is performed by regulating and controlling a direct difference between forward incidence and backward incidence so as to realize the JK trigger.

Description

Technical Field

[0001] The invention belongs to the field of electromagnetic wave modulation, and in particular relates to an optical JK trigger device based on a superstructure. Background Art

[0002] As the demand for data processing accuracy, speed and capacity in future cities continues to rise, traditional electronic devices are gradually showing their limitations. Electromagnetic wave modulation technology plays a vital role in the field of communications by changing certain characteristics of the carrier wave to achieve long-distance and efficient data transmission. From the real-time processing of traffic flow data by intelligent transportation systems to the integration of various types of urban operation information by smart city management centers, strict requirements are placed on the accuracy, speed and capacity of data processing. Although electromagnetic wave modulation technology has achieved remarkable results in the field of communications and achieved long-distance and efficient data transmission, in the face of growing data demand, it is urgent to further improve data processing capabilities.

[0003] In the development of modern digital technology, traditional circuit logic coding is the cornerstone of building digital systems. Early computers built logic circuits based on vacuum tubes. Although they were bulky and energy-intensive, they laid the foundation for digital computing. With the development of semiconductor technology, transistors and integrated circuits have appeared one after another, and the application scenarios of traditional circuit logic coding have continued to expand. Inside the computer, from the instruction processing of the central processing unit to the data storage and reading of the memory; in the field of communications, from the signal processing of early telephone switches to the data transmission control of today's 5G communication base stations, traditional circuit logic coding plays a key role.

[0004] Nevertheless, as the physical limits are approached, traditional circuit logic coding still has urgent problems to be solved in terms of data processing speed, bandwidth and energy consumption. Optical logic circuits have shown great potential in logic operations and information coding due to the unique advantages of photons, such as fast transmission speed and large amount of information that can be carried. The propagation speed of light is much faster than the transmission speed of electrons in circuits, and it has rich dimensions such as wavelength and polarization that can be used to encode information. As an artificially designed micro-nanostructure material, metamers can flexibly control the electric field, magnetic field and phase characteristics of light, providing a new way to realize optical JK triggers.

[0005] After searching, it was found that the Chinese patent with publication number CN119437040A disclosed a structured light 3D detection system, method and device based on optical phased array coding on February 14, 2025. The structure includes an optical phased array module, an acquisition module and a control module. It solves the problem of being unable to adjust the structured light source and improves the flexibility and controllability of 3D detection.

[0006] In summary, the main problems faced by traditional circuit logic coding devices include slow coding speed and limited modulation bandwidth. These challenges limit its functions in modern information processing and its wide application in other scenarios. Therefore, the new optical metastructure JK trigger device designed by us, based on the mirror-symmetric structure of magnetized plasma, provides an effective solution. This device not only shows significant advantages in tunability and fast transmission speed, but also opens up a new path for the modulation and coding of electromagnetic waves. Summary of the invention

[0007] In order to solve the above technical problems, the present invention proposes an optical JK trigger device based on a metamer, which has non-reciprocal characteristics. Specifically, the non-reciprocal characteristic refers to that the device exhibits different response characteristics to electromagnetic waves in different incident directions, thereby realizing the modulation function of electromagnetic waves. The device designed by the present invention can provide adjustable transmission characteristics within a specific band range (49 THz~51 THz). Specifically, when the electromagnetic wave is incident at 70° perpendicular to the normal direction, under different magnetic fields and temperature characteristics, the electromagnetic waves incident in the front and rear directions may show differences in transmission characteristics. When the VO2 temperature is defined as 30 ℃ as the low level of input, the magnetic field size at this time is 0.001 T, and the non-reciprocal transmission characteristics of the spectrum are defined as logical value "1", otherwise it is logical "0". When the VO2 temperature is defined as 85 ℃ as the high level of input, the half-height width of the resonance peak will become wider, and the resonance characteristics will be weakened, but when the non-reciprocal characteristics exist, it is still defined as logical value "1", otherwise it is logical "0". Finally, by adjusting the temperature sequence change of VO2 to form a sequence level input, a JK trigger can be realized in combination to complete the sequential logic function, which broadens the field of optical coding and provides new ideas for existing coding technology.

[0008] To achieve the above object, the technical solution adopted by the present invention is: An optical JK trigger device based on a metastructure is packaged with four substrates. The upper and lower substrates are magnetic substrates with the same characteristics, and the left and right substrates are transparent conductive substrates. The main body surrounded by the substrates is two quasi-periodic structures for realizing JK triggering. Electromagnetic waves are incident into the device along the arrangement direction of the quasi-periodic structures.

[0009] The device is packaged with four substrates. The upper and lower substrates are magnetic substrates of the same characteristics and have the characteristics of conducting magnetic fields. The left and right substrates are transparent conductive substrates with good light transmittance to electromagnetic waves in a specific band. The core body surrounded by the substrates is two quasi-periodic structures for realizing JK triggering. Electromagnetic waves are incident into the device along the arrangement direction of the quasi-periodic structures. The core body surrounded by the substrates is a mirror-symmetrical aerogel and magnetized plasma layer mixed with VO2. The introduction of magnetized plasma produces a magneto-optical effect, promotes the realization of non-reciprocal transmission characteristics, and realizes the regulation of electromagnetic waves.

[0010] In the frequency band of 49 THz~51 THz, when the electromagnetic wave is incident from the air in a direction 70° away from the normal of the left and right substrates, the response of the device to the electromagnetic wave is significantly different under the forward and reverse incidence conditions. Specifically, are the transmission characteristics of the device the same under such forward and reverse incidence conditions? In the case of electromagnetic waves incident in the forward and reverse directions, the same transmission characteristics are defined as code "0", and different transmission characteristics are defined as code "1". Similarly, the case where the codes are "1" and "0" respectively actually reflects the non-reciprocal characteristics of the device, and can show different electromagnetic wave modulation effects under different incident directions.

[0011] Furthermore, the quasi-periodic structure is composed of an A layer as an aerogel layer and a B layer as a plasma film layer, and the arrangement order follows a specific periodic pattern, and the middle C layer is inserted into the vanadium dioxide VO2 layer, that is, the lateral arrangement order of the medium is (A-B1) N -C-(A-B1) N -(BA) N -C-(BA) N , in a mirror-symmetrical arrangement, forming the overall optical metamer. N is the number of periods of the dielectric material arrangement. N=9 indicates that the periodic order of the aerogel and plasma film layers is 9.

[0012] The introduction of this magnetic medium and the mirror-symmetrical structure are helpful to study the transmission characteristics of electromagnetic waves and realize the encoding function.

[0013] Furthermore, the refractive index parameter of the aerogel layer is n a =1.05, thickness parameter is d a =0.015 m, and a diamond pattern is etched on the aerogel layer, which is helpful for the propagation of electromagnetic waves.

[0014] Furthermore, the upper and lower substrates and the left and right substrates are all AZO substrates, and the thickness of all substrates is 1 micron.

[0015] Furthermore, the plasma film layer is subjected to an external magnetic field to excite the material properties. The magnetized plasma adopts the Drude model, the collision frequency of the plasma is 0.0004 times the cyclotron frequency, and the thickness parameter is d b =6.5 mm.

[0016] Furthermore, the thickness of the vanadium dioxide VO2 layer is 1 mm, and the Drude-Lorentz dielectric constant model is adopted, with temperatures of 30°C and 85°C as periodic logic levels to achieve pulse signal input.

[0017] Compared with the prior art, the present invention has the following technical effects: The present invention utilizes magnetized plasma to realize obvious non-reciprocal characteristics, which can be used as a standard for determining logical values.

[0018] The present invention uses VO2 as a defect peak to determine the non-reciprocal characteristics. In addition, at different temperatures, VO2 will produce resonance peaks with different half-height widths, and the transmission characteristics can be significantly dynamically regulated.

[0019] The subject part of the present invention adopts layered superstructures for stacking and arrangement, and has a compact structure, is easier to manufacture and process, and is conducive to industrial mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an overall schematic diagram of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention; Figure 2 It is a logic circuit analogy diagram of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention; Figure 3 A logic signal diagram of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention; Figure 4 is a logic value “0” of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention under a low-level magnetic field of 0.001T at 30°C; Figure 5 is a logic value “1” of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention at a low-level magnetic field of 0.3 T at 30° C.; Figure 6 is a logic value “0” of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention under a high-level magnetic field of 0.001T at 85°C; Figure 7 is a logic value “1” of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention under a high-level magnetic field of 0.3T at 85°C; Figure 8 A simulation function diagram of an optical JK flip-flop device implemented based on a superstructure according to an embodiment of the present invention; Fig. 9 This is a diagram showing the electromagnetic wave incident condition of an optical JK trigger device implemented based on a metastructure according to an embodiment of the present invention.

[0021] In the figure: 1- a symmetric superstructure with double-sided properties; 2- lithium niobate (LiNbO3); 3- silicon nitride (Si3N4); 4- barium tungstate (BaWO4); 5- aluminum nitride (AlN); 6- silicon nitride (Si3N4); 7- lithium niobate (LiNbO3); 8- aerogel layer; 9- magnetized plasma layer; 10- VO2 layer; 11- magnetic substrate; 12- transparent conductive substrate; 13- silicon (Si). DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: The present invention is an optical JK trigger device based on a metastructure, and the main body of the device includes an aerogel layer, a plasma layer and a VO2 layer. In the present invention, the non-reciprocal property is used to achieve different non-reciprocal resonance peaks at different temperatures under different incident directions of electromagnetic waves.

[0023] When the whole device is working, when the frequency of the incident electromagnetic wave is in the range of 49THz~51THz, the incident angle is 70°, the temperature is set to 30℃, and the magnetic field is set to 0.001T, the device shows a reciprocal transmission effect, which is defined as the logical coding value "0". When the magnetic field is 0.3T, non-reciprocal transmission is achieved, and the logical coding value is defined as "1". Correspondingly, when the temperature is set to 85℃, the coding situation is similar, the magnetic field is 0.001T, the reciprocal transmission effect is achieved, and the logical value is "0". When the magnetic field is 0.3T, the non-reciprocal transmission effect is achieved, and the logical value is "1".

[0024] like Figure 1 As shown, the overall medium arrangement order is (AB) N -C-(AB) N -(BA) N -C-(BA) N The number of cycles N = 9, the dielectric constant of the magnetized plasma is fitted by the Drude model, the thickness of the magnetized plasma film is 6.5 mm, the refractive index of the aerogel is 1.05, the thickness is 0.015 μm, the thickness of the VO2 layer is 1 mm, and the Drude-Lorentz dielectric constant model is used.

[0025] like Figure 2The circuit diagram of the JK flip-flop is shown in Figure 1. It works based on the clock signal. The temperature changes to 30°C and 85°C respectively represent the high and low levels of the signal. The output state is changed by the input signals J and K. Its output has two complementary states, represented by "Q" and "Q NOT".

[0026] like Figure 3 In the logic signal diagram shown, when the signal level is always "0101010101010", the output state Q is "00011001100".

[0027] like Figure 4 As shown, when the frequency of the electromagnetic wave is between 49 THz and 51 THz, the temperature is 30°C, and the magnetic field is 0.001 T, reciprocal transmission represents a coding value of "0".

[0028] like Figure 5 As shown, it means that the magnetic field is 0.3 T, and the realization of non-reciprocal transmission represents the coding value of "1".

[0029] like Figure 6 As shown, the temperature is 85°C, the magnetic field is 0.001 T, and reciprocal transmission represents a coding value of "0".

[0030] like Figure 7 As shown, when the JK trigger is working, the magnetic field is 0.3 T, and the non-reciprocal transmission represents the coding value of "1".

[0031] like Figure 8 As shown, the functional diagram of the proposed JK trigger includes an input port composed of 2- and 7-lithium niobate, an output port composed of 3- and 6-silicon nitride, a temperature control port composed of 4-barium tungstate, a chemical potential control port composed of 5-aluminum nitride, and the main function is a symmetric superstructure with 1-double-sided characteristics.

[0032] like Fig. 9 As shown in the figure, when the main lifting structure is working, the direction of the electromagnetic wave is positive incidence along + x The incident direction is axial, and the reverse incident direction is the incident direction. The internal layers of the medium are represented as 8-aerogel layer; 9-magnetized plasma layer; 10-VO2 layer; 11-magnetic substrate; 12-transparent conductive substrate; 13-silicon (Si).

[0033] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. An optical JK flip-flop device based on a metastructure, characterized in that: It is packaged with four substrates. The upper and lower substrates are magnetic substrates with the same characteristics, and the left and right substrates are transparent conductive substrates. The main part surrounded by the substrates is two quasi-periodic structures for realizing JK triggering. Electromagnetic waves are incident into the device along the arrangement direction of the quasi-periodic structure.

2. The optical JK flip-flop device based on a metastructure according to claim 1, characterized in that: The quasi-periodic structure is composed of an A layer, which is an aerogel layer, and a B layer, which is a plasma film layer. The arrangement order follows a specific periodic pattern, and the middle C layer is inserted into a vanadium dioxide VO2 layer, i.e., the lateral arrangement order of the medium is (A-B1) N -C-(A-B1) N -(BA) N -C-(BA) N , in a mirror-symmetrical arrangement, forming the overall optical metamer. N is the number of periods of the dielectric material arrangement. N=9 indicates that the periodic order of the aerogel and plasma film layers is 9.

3. The optical JK flip-flop device based on a metastructure according to claim 2, characterized in that: The refractive index parameter of the aerogel layer is n a =1.05, thickness parameter is d a =0.015 m.

4. The optical JK flip-flop device based on a metastructure according to claim 4, characterized in that: A diamond pattern is etched on the aerogel layer.

5. The optical JK flip-flop device based on a metastructure according to claim 1, characterized in that: The upper and lower substrates and the left and right substrates are all AZO substrates, and the thickness of all substrates is 1 micron.

6. The optical JK flip-flop device based on a metastructure according to claim 2, characterized in that: The plasma film layer is applied with a magnetic field to excite the material properties. The magnetized plasma adopts the Drude model. The collision frequency of the plasma is 0.0004 times the cyclotron frequency. The thickness parameter is d b =6.5 mm.

7. The optical JK flip-flop device based on a metastructure according to claim 2, characterized in that: The thickness of the vanadium dioxide VO2 layer is 1 mm. The Drude-Lorentz dielectric constant model is used, and the temperature is 30℃ and 85℃ as the periodic logic level to realize the pulse signal input.

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