365 results about "Surface plasmon polariton" patented technology

The invention provides a deep frequency shift super-resolution microscopic imaging chip and a deep frequency shift super-resolution microscopic imaging system for omni-directional ultra-high wave vector illumination, and belongs to the technical field of optical super-resolution microscopy. The chip comprises a substrate plated with an adhesion layer and multiple layers of films on the adhesion layer, and sub-wavelength-scale circular ring gratings are engraved on the substrate and the adhesion layer; exciting light enters the circular ring grating through the substrate, and evanescent waves of ultrahigh wave vectors in all directions are generated through the circular ring grating. The evanescent waves are coupled to the upper surface through the multi-layer thin film to excite surface plasmons with ultrahigh transverse wave vectors in the corresponding direction, and the surface plasmons are used for carrying out all-directional ultrahigh wave vector illumination and deep frequency shift super-resolution microscopic imaging on a sample placed on the upper surface of the multi-layer thin film. The system comprises an excitation module, a deep frequency shift super-resolution microscopic imaging chip for omni-directional ultra-high wave vector illumination, an imaging module and an excitation control and image acquisition module. According to the invention, omni-directional ultra-high resolution imaging of a complex fine structure sample can be realized, so that application requirements in related fields can be met.

The invention relates to the technical field of optical metasurface and light field regulation and control, in particular to a light pressure multi-dimensional regulation and control method and device based on a metasurface microstructure array. The method comprises the following steps: designing and preparing a metasurface microstructure array, wherein the microstructure array is composed of a plurality of sub-wavelength scale three-dimensional microstructure units arranged on a dielectric substrate; surface plasmon resonance is excited by adjusting structural parameters of the three-dimensional microstructure units and adjusting working parameters of a light source acting on the microstructure array, and near-field localization and enhancement are achieved. And calculating, regulating and controlling the light pressure borne by the metasurface microstructure array based on the Maxwell stress tensor. The method can keep a remarkable light pressure enhancing effect in a wide spectrum range of 380-1300 nm, and is suitable for various material systems such as silver, gold and the like. The method can be applied to the fields of optical tweezers systems, optical control devices, precision measurement and the like, and has the advantages of flexible design, simplicity and convenience in preparation, high regulation and control precision and the like.

The invention provides a spectrometer system comprising a spectrometer chip comprising a camera and a metasurface located on a detection surface of the camera; the metasurface comprises a plurality of nano-pore or nano-column arrays, and selective absorption of light with different wavelengths is realized through surface plasmons generated by different nano-pores or nano-columns; the camera detects the intensity change of light to be detected after the light passes through different nano-pores or nano-column arrays of the metasurface, and then spectral information is obtained through calculation. According to the spectrograph system, selective absorption of light with different wavelengths is achieved through the metasurface, and then spectral information is obtained through calculation, so that the structure of the spectrograph system is compact, and the overall size is very small; and the plasmon generated by the nanopore or nanopillar array has high tolerance to the structure size, so that the processing precision is lower, and large-area and large-batch preparation can be realized.

The invention discloses a filter and electronic equipment. The filter comprises a substrate and a quasi-surface plasmon polariton (SSPP) array. The SSPP array comprises m SSPP units, and the m SSPP units are the same in size. Each SSPP unit in the m SSPP units comprises a first metal strip and a second metal strip which are symmetrically arranged and do not make contact with each other, the first metal strip is located on the upper surface of the substrate, and the second metal strip is located on the lower surface of the substrate. The first metal strip comprises a rectangular structure and an anchor-shaped structure, one end of the rectangular structure is coupled with the edge of the substrate, the other end of the rectangular structure is coupled with the anchor-shaped structure, the width of the anchor-shaped structure is larger than that of the rectangular structure, and the size of the first metal strip is related to tuning parameters of the filter. Therefore, the tuning parameter of the filter can be determined by directly adjusting the size of the first metal strip, and the design flexibility of the filter is improved.

The invention discloses a thermal detection system and a chiral substance identification method, and relates to the technical field of micro-nano optics, the thermal detection system and the chiral substance identification method, based on the structure of the thermal detection system and the steps of the chiral substance identification method, a chiral substance to be detected is configured into a corresponding solution to be detected; a solution to be detected is sampled and placed in the absorber, the surface plasmon effect generated when the metal resonance layer receives chiral light irradiation is utilized, a corresponding thermal signal is output, then the thermal signal is captured and analyzed through the thermal detection system, and high-precision identification of chiral substances is achieved. Compared with a traditional circular dichroism and circular polarization fluorescence spectrophotometer device, the technical scheme provided by the invention is simple in structure, convenient to operate and relatively low in requirements on the concentration and the volume of a detected sample.

The invention discloses a trace biochemical sensor based on deep sub-wavelength singular point resonance, the sensor comprises an upper metal layer, a middle dielectric layer and a lower metal layer which are stacked in sequence from top to bottom, the upper metal layer is a deep sub-wavelength singular point resonance structure pattern, the lower metal layer is an excitation microstrip line, and the middle dielectric layer is a deep sub-wavelength singular point resonance structure pattern. Resonance of the deep sub-wavelength singular point resonance structure pattern is excited by the excitation microstrip line. By effectively adjusting the rotation angle of the deep sub-wavelength singular point resonance structure graph, the resonance mode field of the sensor is gradually evolved into a singular point resonance mode from a hybrid bonding and anti-bonding intrinsic resonance mode. According to the sensor, the equivalent working wavelength of the deep sub-wavelength artificial local surface plasmon resonance unit is compressed, and the electromagnetic field enhancement characteristic of a singular point resonance mode and the square root dependency relationship of tiny dielectric disturbance are combined, so that the high-sensitivity resolution of trace biochemical quantity is realized in a low-frequency microwave band.

The invention discloses a vortex beam orbital angular momentum detector based on surface plasmon and a detection method, and belongs to the field of micro-nano photonics and photoelectric detection. The detector is based on a plane photoelectric detector of a metal-semiconductor-metal type, a vortex light field beam splitting structure is arranged on a metal electrode on one side of the detector or between two metal electrodes, the vortex light field beam splitting structure comprises an incident coupling grating, an incident light field carrying different orbital angular momentums can be split into plasmons in different directions, and the plasmons in different directions can be split into a vortex light field. The single detector resolution of the orbital angular momentum of the vortex beam is realized through the direction and propagation loss difference of plasmons. The detector is compatible with an existing semiconductor technology, the structure is simple, vortex light beams carrying high-order orbital angular momentum can be detected, and the rotation direction of a vortex light field can be detected.

The invention discloses a multi-mode sensing manipulator system based on flexible electronic skin, an integration process and a test method, and the multi-mode sensing manipulator system based on the flexible electronic skin comprises a flexible electronic skin sensor attached to a manipulator; the flexible electronic skin sensor comprises a flexible sheet and a liquid alloy network arranged in the flexible sheet, the liquid alloy network comprises an SSPP structure and a piezoresistive sensing structure located on the periphery of the SSPP structure, and the SSPP is a simulated surface plasmon; the piezoresistive sensing structure is connected with the signal processing circuit through a flexible wire bar and transmits a piezoresistive signal to the processor; the SSPP structure is connected with the SDR module through a coaxial line and is connected with the processor. According to the multi-mode sensing manipulator system based on the flexible electronic skin, the integration process and the testing method, the functions of multi-dimensional force feedback, substance penetrating type sensing and dynamic curved surface adaptation are achieved.

The invention discloses an on-chip plasma scattering microscope based on a one-dimensional photonic crystal, which belongs to the field of imaging and detection of surface waves on small-particle weak signals and comprises an image plane detector, an imaging tube lens, an air objective lens, a gold film, the one-dimensional photonic crystal, a scattering layer and an LED light source. And refractive index matching oil is dripped between the gold film and the one-dimensional photonic crystal and between the photonic crystal and the scattering layer for adhesion. After light beams emitted by the LED light source pass through the scattering layer, the light beams are scattered to various angles, the light beams are filtered and screened by the one-dimensional photonic crystal in a momentum space, surface plasmon polaritons of a gold film and an air interface can be excited in all directions, nanoscale particles placed on the gold film are illuminated, and scattered light of the particles is collected by the air objective lens placed above. According to the invention, the interaction between light and nano particles is greatly improved, the scattering signal intensity of the particles is increased, the imaging quality is improved, and the nano particles with very small scattering signals can be imaged and detected.

The invention provides a plasma resonance enhanced microstructure of an infrared photoelectric detector and a preparation method, and belongs to the technical field of medium-wave infrared photoelectric detectors, and the method comprises the steps: enabling incident light to irradiate downwards from the upper part of a top resonance layer when the medium-wave infrared photoelectric detector is used, and enabling the incident light to irradiate downwards from the lower part of the top resonance layer; the bottom resonance layer, the dielectric blocks and the top resonance layer form an array-arranged microstructure which can excite a plasmon mode, a surface plasmon resonance effect is triggered near the surface of the photosensitive layer through the combined action of the top resonance layer and the bottom resonance layer, the dielectric blocks are embedded in the bottom resonance layer, and the surface plasmon resonance effect is achieved. Incident light is localized in a shallower depth in a photosensitive surface, the intensity of a local electric field is enhanced, the reflection phenomenon of the photosensitive surface is reduced, the light absorption rate of the detector is improved, and the quantum efficiency of the medium-wave infrared photoelectric detector is further improved.

The invention discloses a preparation method of a flexible infrared super-surface absorber based on MDM, and belongs to the field of micro-nano machining patterning. The method comprises the following steps: pretreating a polymer material; depositing a layer of bottom metal film on the pretreated substrate by adopting magnetron sputtering; a metal reflecting layer, a dielectric insulating layer and a metal surface functional layer are sequentially deposited through magnetron sputtering, a periodic nano microstructure is constructed on the surface of a flexible composite film, a nano round pit array is etched in situ on a surface metal layer of an MDM structure by using a femtosecond laser selective etching process, and an MDM laminated structure is formed. According to the invention, stable integration of the MDM structure and the flexible substrate can be realized, and meanwhile, high absorptivity and good flexibility of the device in an infrared band are ensured. The absorber prepared by the invention can generate resonance absorption on incident infrared electromagnetic waves through a surface plasmon and F-P cavity resonance coupling mechanism, and meanwhile, the characteristic size variation is changed through physical excitation, so that effective absorption and frequency regulation of the electromagnetic waves at the infrared band of 3-14 microns are realized.

The invention belongs to the field of photoelectricity, and particularly relates to a plasmon polarization sensitive detector based on a micro-nano structure. The innovation points are as follows: (1) the light absorptivity of molybdenum disulfide is enhanced by utilizing an electric field generated by a local surface plasmon effect; and (2) the detection of the molybdenum disulfide photoelectric detector on polarized light is realized. According to the main implementation scheme, a graphical gold nanostructure is transferred to molybdenum disulfide, so that detection of the molybdenum disulfide on polarized light is realized; the surface electric field of the molybdenum disulfide is further enhanced through the localized surface plasmon effect generated when the gold nano array is excited, so that the carrier generation rate of the molybdenum disulfide is increased. Compared with a traditional molybdenum disulfide photoelectric detector, the device can detect polarized light, and meanwhile, the absorption rate of molybdenum disulfide to visible light (0.38-0.7 mu m) is enhanced to a certain extent, so that the application scene is greatly widened, and the application range is greatly widened.

The invention relates to the technical field of semiconductor packaging, and discloses a bonding wire welding method based on bare chip interconnection, and the method comprises the steps: collecting and fusing acoustic response and optical reflection signals of a bonding interface in real time through a multi-mode in-situ sensing mechanism integrating acoustic resonance and surface plasmon resonance; dynamically calculating the thickness, the mechanical coupling deformation and the energy dissipation state of the intermetallic compound layer; and the ultrasonic power and the bonding force are subjected to closed-loop adjustment in combination with a model prediction control algorithm, so that the welding process is evolved along a preset optimal physical path all the time. The system comprises a multi-mode sensing welding head, a synchronous data acquisition module, a state resolving module and a self-adaptive control module. The transparent and intelligent welding process is realized, and the bonding consistency, reliability and yield of high-density interconnection are remarkably improved.

The invention discloses a one-dimensional photonic crystal photoelectric sensor of an optical Tamm state and surface plasmon. The one-dimensional photonic crystal photoelectric sensor comprises a substrate layer, a DBR structure layer and a silver film layer which are connected in sequence. The one-dimensional photonic crystal photoelectric sensor does not need a specific incident angle, the forming condition is relatively simple, the application of a strong coupling system in the fields of sensing, fluorescent light field regulation and the like is realized, the one-dimensional photonic crystal photoelectric sensor can be used for detecting trace samples such as macromolecular solutions and biological reagents, and the sensing performance is greatly improved.

The invention discloses an artificial surface plasmon microstrip transmission line with a crosstalk suppression effect. The transmission line conduction band is provided with a periodic internal notch groove structure which is used for transmitting microwave artificial surface plasmons with strong local field constraint performance. The periodic notch grooves can be S-shaped, spiral, T-shaped, cross-shaped, KoCh-shaped, Moore Curve-shaped and other forms and are distributed in the microstrip conduction band, and the width of the conduction band is not increased, so that the remarkable inhibition effect that the far-end crosstalk is lower than-30dB is realized on the premise that the size of the microstrip line is not changed. The microstrip transmission line has the low-pass characteristic, the frequency response falling edge is steep, the cut-off frequency can be flexibly adjusted by adjusting the notch groove width and the number of iterations, and application requirements of different frequency bands can be met by scaling. The structure is simple, the size is compact, inter-line crosstalk can be effectively suppressed, the signal transmission quality is improved, the strict signal integrity requirement is met, and the high-frequency and high-speed signal transmission and functional devices are widely applied, and the wide application prospect is achieved.

The invention relates to the technical field of optical engineering, and discloses a near-infrared polarization insensitive MEMS tunable metasurface band-pass filter which comprises a silicon substrate and a gold structure covering the silicon substrate. The gold structure comprises an upper-layer gold structure and a lower-layer gold structure which are connected through the MEMS, the upper-layer gold structure and the lower-layer gold structure are both square, and the centers of the upper-layer gold structure and the lower-layer gold structure are subjected to square hollow treatment to form a metasurface An FP resonant cavity is formed between the upper and lower gold structures; surface plasmons are generated on the contact surface of the gold structure and the hollow air layer; under the combined action of the FP resonant cavity and the surface plasmon, the metasurface structure realizes transmission of electromagnetic waves at a specific wavelength, and a band-pass filtering effect is achieved. The tunable metasurface band-pass filter provided by the invention is a transmission type metal metasurface filter, a surface plasmon effect is generated on the contact surface of a gold structure and a square hollow-out air layer, two physical mechanisms are coupled to filter a specific wavelength, and the working wavelength can be tuned through an external MEMS structure.

The invention provides a method and a device for laser-induced plasma assisted preparation of a stripe structure. The method comprises the following steps: S1, building a laser processing system; s2, a metal target material is placed on a displacement workbench, and the transparent hard and brittle material is located above the metal target material; s3, a laser beam emitted by a laser passes through an objective lens and the transparent hard and brittle material and then is focused on the metal target material, metal plasma transferred to the back face of the transparent hard and brittle material is induced, metal particles are deposited on the back face of the transparent hard and brittle material through the metal plasma, and laser irradiates the metal particles to excite surface plasmons, the surface plasmon interferes with incident light, so that a periodic nano stripe structure is formed; s4, the laser beam is controlled to conduct machining on the surface of the transparent hard and brittle material according to the preset machining parameters and the scanning path; and S5, the transparent hard and brittle material processed in the step S4 is placed in an absolute ethyl alcohol solution to be subjected to ultrasonic cleaning and drying.

The invention discloses a Fano resonance sensor based on a surface plasmon coupled planar waveguide. The Fano resonance sensor sequentially comprises a zinc selenide prism, a bismuth selenide layer Bi2Se3, a Teflon layer Teflon, a silicon dioxide layer SiO2, a TiO2 layer and a dielectric layer to be measured from top to bottom. Compared with a traditional sensor, the sensing characteristic spectrum line width of the model is narrower, the local electromagnetic field is greatly enhanced, the radiation loss of the traditional SPR sensor is remarkably reduced, and the sensitivity is improved by at least two orders of magnitude. The SPR effect excited by the bismuth selenide material is coupled with a PWG mode generated by a planar waveguide structure composed of silicon dioxide, titanium dioxide and a to-be-detected medium to generate the optical sensor with Fano resonance as a mechanism, the sensitivity can reach 7700 RIU <-1 > or above within an existing parameter adjusting range, and compared with a traditional SPR sensor, the sensitivity of the optical sensor is greatly improved. Performance indexes such as sensitivity are improved by 2-3 orders of magnitude.

The invention discloses a cell wide-spectrum detection method based on a terahertz artificial surface plasmon transmission line, and belongs to the field of cell wide-spectrum detection.The cell wide-spectrum detection method comprises the steps that the structure and size of the terahertz SSPP transmission line are designed, and a detection cavity packaged with the terahertz SSPP transmission line is prepared; connecting the detection chamber with a terahertz test platform, enabling the to-be-detected blood sample to flow into the detection chamber, and starting the test platform; the method comprises the following steps: irradiating an incident terahertz wave beam to the upper surface of a transmission line by using a high-resolution and large-dynamic terahertz frequency domain scanning test technology, efficiently coupling an incident terahertz free space wave with the transmission line, and exciting an SSPP wave with a high local characteristic on the surface of the transmission line; phase, amplitude and cut-off frequency data of an SSPP wave transmission spectrum are obtained, terahertz spectrum characteristics of cells are analyzed, and non-contact, unmarked and high-sensitivity detection and qualitative recognition of cell wide-spectrum information are achieved.

The invention belongs to the technical field of temperature sensors, and particularly relates to an up-conversion luminescence temperature sensor based on a plasmon effect and preparation and application thereof. The core of the sensor provided by the invention is a composite structure formed by a gold nanorod array and Er < 3 + > and Yb < 3 + > co-doped NaYF4 up-conversion nanoparticles, and the gold nanorod array is prepared by adopting a two-way aluminum oxide template method and is regularly and orderly arranged in a hexagonal shape. Under the excitation of 980nm near-infrared light, the local surface plasmon resonance effect of the gold nanorods can significantly improve the up-conversion luminescence intensity and accelerate the thermal response rate of the sensor; the ratio type temperature sensing system is constructed by detecting the fluorescence intensity ratio of two emission bands of 515-535 nm and 535-555 nm, self-calibration accurate detection within the temperature range of 303-348 K can be achieved, and the sensor has the advantages of being uniform in structure, controllable in preparation, high in detection sensitivity, high in response speed and the like.

The invention relates to the field of micro electro mechanical systems, and discloses a method and device for directly eliminating damping unevenness of a hemispherical harmonic oscillator by femtosecond laser, and the method comprises the steps: obtaining the damping unevenness value and azimuth information of the hemispherical harmonic oscillator through a test circuit; according to the azimuth information, the corresponding to-be-machined position is moved to a femtosecond laser focus; performing rotary etching processing on the position by using femtosecond laser, and forming a periodic micro-nano structure based on a surface plasmon polarization theory on the surface of the harmonic oscillator; according to the structure, local damping distribution and energy dissipation can be directly changed, and damping unevenness is finally eliminated to be within the required range through cyclic testing and machining. As a direct elimination method, the method has the advantages of being non-contact, high in precision, high in efficiency, high in relevance and the like, the machining process is non-thermal, residual stress is hardly generated, the key technical bottleneck of resonant gyroscope manufacturing is effectively solved, and a foundation is laid for future batch production of high-precision hemispherical resonant gyroscopes.

A photodetector includes a metal layer that shields incident light and generates surface plasmon polaritons (SPPs), a light absorbing layer that absorbs the generated SPPs and allows charges excited by the absorbed SPPs and a localized electric field effect to tunnel, a dielectric formed at nanoholes in which at least a part of the metal layer is opened, and a semiconductor layer that induces the photocurrent based on an electric field effect of tunneled electrons. The SPPs form localized surface plasmons (LSPs) at an interface where the metal layer meets the dielectric.

The invention discloses an optical fiber surface plasmon probe for high-sensitivity hydrogen sensing, and relates to the technical field of optical fiber sensing, and the optical fiber surface plasmon probe comprises a spatial dislocation type double-layer structure which is integrated on the end face of an optical fiber and comprises a first nano-structure on the upper layer and a second nano-structure on the lower layer, the first nano structure and the second nano structure are arranged in a triangular lattice array; the optical cement is arranged at the top of the end face of the optical fiber, and a plurality of dielectric nano-columns arranged in an array are arranged at the top end of the optical cement and used for forming a staggered gap length between the first nano-structure and the second nano-structure; the equivalent dielectric cavity is arranged between the first nanostructure and the second nanostructure and consists of air among the dielectric nanocolumns; wherein the first nano-structure and the second nano-structure are both made of hydrogen-sensitive metal materials. The light weight characteristic of the optical fiber and the high sensitivity advantage of the micro-nano structure are combined, and the sensitivity bottleneck of an existing optical fiber hydrogen sensor is broken through.

The utility model provides an infrared detector based on a mixed structure. The infrared detector comprises a substrate, a first electrode, a first photosensitive layer, a mask layer, a second photosensitive layer and a second electrode which are stacked in sequence, the first electrode is a vertical structure device, and the second electrode is a horizontal structure device; the first electrode is provided with a reflecting surface, and the first photosensitive layer is in a strip shape with a recess; the utilization of the surface plasmon enhancement effect of the first electrode and the second electrode is facilitated; the first electrode is used as a reflecting surface, so that the absorption efficiency of incident light is improved; the long-strip-shaped first photosensitive layer with the concave part is beneficial to multiple times of reflection and absorption of incident light, and the sensitivity and the accuracy of the infrared detector are improved.

The application discloses a kind of light field regulation detection method and device based on computing spectral reconstruction, belong to spectral analysis technical field.The method is by introducing medium-metal composite nanostructure, integrates metal nanoisland array and silicon nitride nanocolumn array on quartz substrate, realizes electric field enhancement using the local surface plasmon resonance effect excited by metal nanoisland array, simultaneously realizes wide spectral range phase coding by medium nanocolumn array;Super surface chip is integrated with single point detector, combines pre-calibrated super surface sensing matrix A and enhancement factor matrix E, and reconstructs spectrum using compressed sensing or Tikhonov regularization algorithm.The application keeps the advantages of miniaturization and no moving parts, realizes directional high sensitivity detection to weak signal, and signal-to-noise ratio is improved.

The present invention provides an artificial surface plasmon high-aperture efficiency end-fire antenna, which includes a dielectric substrate. The upper and lower surfaces of the dielectric substrate respectively form a dielectric substrate top layer and a dielectric substrate bottom layer. The dielectric substrate bottom layer is provided with a grounding metal layer, and the dielectric substrate top layer is provided with a top surface metal layer. The top surface metal layer is provided with a balun structure, a tapered parallel two-wire line, a transitional parallel two-wire line, and artificial surface plasmon radiation strips. One end of the balun structure is a feeding port, and the other end of the balun structure is connected to the end of the transitional parallel two-wire line through a connecting tapered parallel two-wire line. The other end of the transitional parallel two-wire line is connected to a pair of artificial surface plasmon radiation strips. This artificial surface plasmon high-aperture efficiency end-fire antenna has the advantages of high aperture efficiency, low profile, wide operating bandwidth, high directivity, high gain, and relatively small overall size.

A chemiluminescent nanoconstruct is described herein. The chemiluminescent nanoconstruct structure may comprise a plasmon nanostructure having at least one localized surface plasmon resonance wavelength ([lambda] LSPR), at least one spacer coating, at least one chemiluminescent agent having a maximum emission wavelength ([lambda] EM), and at least one biorecognition element. The signal of the chemiluminescent nanoconstruct structure is greater than the signal of only the at least one chemiluminescent agent.

The present invention discloses a substrate structure for surface-enhanced Raman scattering at an off-site and its near-field detection method. The Raman scattering substrate structure includes a substrate and two-dimensional nanosheets assembled on the substrate by a self-assembly method. The two-dimensional nanosheets are polygon structures made of a metal material with surface plasmon characteristics and having at least a pair of parallel end faces. The thickness of the two-dimensional nanosheets is in the nanometer scale, while the side length is in the micrometer scale. When one end face of the two-dimensional nanosheet is excited by an excitation light source, a surface plasmon signal that travels along the surface of the nanosheet is formed and finally output at the other end face parallel to it. The emitted signal interacts with the analyte molecules, and Raman signals are formed at positions different from the excitation light source, thereby preventing the analyte molecules from decomposing due to the irradiation of a high-density light intensity excitation light source. At the same time, the off-site acquisition of Raman signals also avoids the interference of the excitation light source.

Provided are compounds, formulations comprising compounds, and devices that utilize compounds, where the devices include a substrate, a first electrode, an organic emissive layer comprising an organic emissive material disposed over the first electrode. The device includes an enhancement layer, comprising a plasmonic material exhibiting surface plasmon resonance that non-radiatively couples to the organic emissive material and transfers excited state energy from the organic emissive material to the non-radiative mode of surface plasmon polaritons. The enhancement layer is provided no more than a threshold distance away from the organic emissive layer, where the organic emissive material has a total non-radiative decay rate constant and a total radiative decay rate constant due to the presence of the enhancement layer. At least one of the organic emissive material and the organic emissive layer has a vertical dipole ratio (VDR) value of equal or greater than 0.33.

The present invention belongs to the field of surface plasmon nanolasers, and particularly relates to a surface plasmon laser based on a pair of silver nanowires for a Fabry-Perot cavity. The laser includes a single-crystalline pair of silver nanowires, a gain medium, and a super-smooth metal film. An isolation layer is provided on the super-smooth metal film, the gain medium is disposed on the isolation layer, and the single-crystalline pair of silver nanowires are respectively disposed on both sides of the gain medium, so that the pair of silver nanowires and the super-smooth gold film form a surface plasmon resonance cavity of a composite structure, providing strong electric field confinement and directional scattering characteristics. The surface plasmon laser proposed by the present invention has a simple preparation process and is easy to operate. It can effectively convert pump light into surface plasmons and well confine them in the resonance cavity, realizing efficient excitation of the laser, obtaining an ultra-low excitation threshold, and being more suitable for micro-nano on-chip optical integration; by virtue of the scattering directivity of the surface plasmon resonance cavity, the problem of poor directivity of the plasmon laser can be improved. The present invention expands the application of surface plasmon lasers in the field of integrated optics.