320 results about "Mid infrared" patented technology

The invention relates to the technical field of refrigeration material preparation, in particular to an efficient passive radiation refrigeration material suitable for a sub-super environment and a preparation method and application of the efficient passive radiation refrigeration material. The method comprises the following steps: uniformly mixing thermoplastic polyurethane, sunlight high-reflection inorganic particles and a phase change material in a solvent; after a chemical foaming agent is added, the obtained suspension liquid is heated and foamed in a confinement mold, and wet gel is formed; and finally, carrying out freeze drying treatment to obtain the composite porous aerogel. The prepared material has a micro-nano porous skeleton formed by TPU, and inorganic particles and PCM are uniformly dispersed in the skeleton wall. Through component cooperation and a special porous structure, the material has extremely high sunlight reflectivity and mid-infrared emissivity, self-adaptive temperature regulation and control are achieved through PCM phase change, the problem that refrigeration of a traditional material fails in the sub-environment such as the vertical surface is effectively solved, and efficient sub-super-environment heat management is achieved.

The invention discloses an intermediate infrared polarization spectrum imaging method and device. The method comprises the following steps: carrying out joint coding on an intermediate infrared light beam carrying to-be-measured target space, spectrum and polarization information by adopting an intermediate infrared polarization spectrum modulator consisting of metasurface units which are arranged in an array and have non-correlation response characteristics; projecting the coding light field to a two-dimensional detector array to generate a two-dimensional coding image under single exposure; and decoding the two-dimensional coding image through a reconstruction unit so as to reconstruct and obtain a space-spectrum-polarization four-dimensional data cube of the target to be measured. The problem that polarization information cannot be rapidly obtained in the prior art is solved, target full information can be obtained under single exposure, and the system has the advantages of being high in imaging speed, simple in structure, easy to miniaturize and the like.

The present application relates to a kind of on-chip photo-thermal gas sensor and on-chip photo-thermal gas sensor assembly, the refractive index of the upper waveguide material layer of sensor ridge waveguide layer is greater than the refractive index of lower waveguide material layer, can support TM mode pump light and TE mode probe light simultaneously. That is, both high absorption of pump light and weak influence of probe light on the gas to be measured are considered, and the detection accuracy of the gas is improved. Moreover, a simpler waveguide structure is used, and the waveguide preparation process is simple, and the waveguide loss is relatively low. Compared with the photo-thermal interference method in optical fiber sensing, the interaction between pump light and the gas to be measured is greatly improved, the length of the detection waveguide is greatly shortened while ensuring high sensitivity, and the device size can be reduced to micrometer level. In addition, the waveguide structure of the on-chip photo-thermal gas sensor disclosed in the present application is prepared from chalcogenide glass, which has more obvious advantages for gas detection in the mid-infrared waveband.

A first pumping source and a second pumping source are combined through a pumping beam combiner and are coupled into an erbium-doped fluoride fiber and a high-reflectivity fiber bragg grating, and the erbium-doped fluoride fiber and a low-reflectivity fiber bragg grating form a laser resonant cavity. The intermediate infrared laser is output through the low-reflectivity fiber bragg grating, the cladding light filter and the optical fiber end cap; the high-reflectivity fiber bragg grating and the low-reflectivity fiber bragg grating have the same grating period, the fourth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4F9 / 2 energy level to the 4I9 / 2 energy level, and the fifth-order harmonic reflection wavelength of the grating is located in the emission spectrum range of transition of erbium ions from the 4I11 / 2 energy level to the 4I13 / 2 energy level; by adjusting the power of the first pumping source and the second pumping source, the net gain of laser transitions from the 4F9 / 2 energy level to the 4I9 / 2 energy level and transitions from the 4I11 / 2 energy level to the 4I13 / 2 energy level is regulated and controlled, and switching of laser working wavelengths is achieved.

The invention discloses a high-reflection magnesium phosphate / aluminum phosphate radiation refrigeration material and a preparation method thereof, and relates to the technical field of radiation refrigeration materials. The preparation method of the high-reflection magnesium phosphate / aluminum phosphate radiation refrigeration material comprises the following steps: (1) mixing aluminum sec-butoxide and deionized water to prepare a solution A; mgCl2. 6H2O and deionized water are mixed to prepare a solution B; mixing the solution A and the solution B to obtain a solution C; (2) adding 3-sulfopropyl tetradecyl dimethyl betaine into the solution C to obtain a solution D; (3) stirring sodium pyrophosphate and deionized water into a solution E; mixing the solution E and the solution D to obtain a solution F; and (4) reacting the solution F at 150-180 DEG C, cooling, freeze-drying and grinding to obtain H, heating H to 300-400 DEG C at the rate of 3-4 DEG C / min, then heating H to 800-1300 DEG C at the rate of 7-10 DEG C / min, and keeping the temperature for 1-3 hours to obtain the product. The material prepared by the invention has excellent sunlight reflectivity and excellent mid-infrared emissivity, and shows excellent performance in the field of radiation refrigeration.

The invention discloses an ocular surface illumination treatment device and method, and belongs to the technical field of ophthalmology medical equipment and treatment. The device comprises an infrared camera module, a computer terminal analysis control module, an optical power detection module, a mechanical adjustment module, a safety switch module and an illumination module. Wherein the infrared camera module comprises an infrared CCD (Charge Coupled Device) camera and a near-infrared light source which are arranged at a preset included angle and can collect eye images and transmit the eye images to the computer terminal, and the highest recording speed of the infrared camera module is not lower than 200 frames per second; and the computer terminal analyzes the image to obtain pupil positions, diameters and distances, and adjusts relative positions of a shielding device and a lens group in the light path of the illumination module, the axis of the light path and the distance between left and right lens cones, so that the central dark area of the annular light spot is matched and overlapped with the pupil. Eye images are collected and processed firstly, then light spots and the lens cone are adjusted, finally phototherapy and real-time monitoring are carried out, light can be prevented from entering the fundus, the treatment safety is improved, and the device is suitable for ocular surface diseases such as xerophthalmia.

Disclosed is a photodetector, preferably a mid-infrared photodetector, composition comprising semiconductor particles (101) comprising a band gap of less than 1.5 eV, preferably less than 1eV, and metal nanoparticles (103), wherein the semiconductor particles are interconnected via electrically conducting bridges (102) comprising the metal nanoparticles thereby forming an electrically conductive network. A photodetector comprising the composition and a method of manufacturing the composition are also described.

A mulch may include a hydrophilic cellulose layer and hydrophobic top layer formed on the cellulose layer. The cellulose layer and top layer together may form a wettability gradient which facilitates directional water transport from the hydrophobic top layer to the hydrophilic cellulose layer. A surface of the hydrophobic top layer is optically opaque and exhibits a solar reflectance of 85% to 98% in response to incident light the 250-2500 nm wavelength range. The mulch provides a mid-infrared emissivity of 0.85 to 0.97 in the 8-13 μm range. The solar reflectance and mid-infrared emissivity decrease underlying soil temperature by at least 2° C. compared to uncovered soil under equivalent solar conditions.

The invention discloses an ultra-wideband heterogeneous five-core anti-resonance optical fiber for transmission from ultraviolet to intermediate infrared, and belongs to the technical field of optical fiber communication. The heterogeneous five-core anti-resonance optical fiber sequentially comprises a perfect matching layer, an outer cladding layer, a first light guide unit, a second light guide unit, a third light guide unit, a fourth light guide unit and a fifth light guide unit from outside to inside along the fiber diameter, wherein the first light guide unit, the second light guide unit, the third light guide unit, the fourth light guide unit and the fifth light guide unit are arranged in the outer cladding layer. A plurality of nesting tube assemblies and gap tube assemblies with the same or different structures are arranged in each light guide unit in the circumferential direction at equal intervals, and a central air fiber core area, a left upper air fiber core area, a right lower air fiber core area, a right upper air fiber core area and a left lower air fiber core area are defined by the assemblies and work at the wave bands of 0.15-2.0 m, 2.0-3.0 m, 3.0-4.0 m, 4.0-6.0 m and 6.0-7.0 m correspondingly. And all the components show extremely low restrictive loss, dispersion close to zero and a relatively low nonlinear coefficient.

An image processing method and an image processing apparatus therefor, and a computer-readable storage medium. The image processing method comprises: performing N-layer pyramid decomposition on a visible light original image to obtain a visible light base layer; performing N-layer pyramid decomposition on an infrared original image to obtain an infrared base layer; on the basis of an infrared pixel weighting curve and a visible light pixel weighting curve, performing image fusion on the visible light base layer and the infrared base layer to obtain a base layer fused image. The present application performs N-layer pyramid decomposition on a visible light original image to obtain a visible light base layer, performs N-layer pyramid decomposition on an infrared original image to obtain an infrared base layer, and fuses the visible light base layer and the infrared base layer on the basis of an infrared pixel weighting curve and a visible light pixel weighting curve, such that display weightings of different pixel values of the infrared base layer in the base layer fused image vary, thus effectively improving the degree of prominence of infrared targets after fusion.

The invention provides an infrared polarization beam splitter in a bow-tie-type dual-core photonic crystal fiber plated with a gold film, and the beam splitter comprises a substrate which is made of pure silicon; the first circular air hole is formed in the center of the substrate, and the inner side of the first circular air hole is plated with a gold film; the two fiber cores are symmetrically arranged on the two sides of the first circular air hole; the two elliptical air holes are symmetrically formed in the outer sides of the two fiber cores; the 38 second circular air holes surround the first circular air hole, the two fiber cores and the two elliptical air holes to form a bow tie type arrangement structure; the 72 third circular air holes surround the second circular air holes to form a bow tie type arrangement structure; the aperture of the third circular air hole is larger than that of the second circular air hole; the distance between any two adjacent third circular air holes is equal to the distance between any two adjacent second circular air holes.

The invention relates to the technical field of spectral measurement, in particular to a quantum correlation enhanced optical comb spectrum device and method, and the method comprises the steps: processing pump light and seed light to obtain idler frequency light and intrinsic light with quantum correlation; performing time domain matching adjustment on the idle frequency light, and reflecting the idle frequency light after the time domain matching adjustment to obtain a time-matched quantum correlation light beam; combining the intrinsic light and a continuous laser to obtain a first combined light; the mid-infrared light comb generates mid-infrared light carrying gas information after penetrating through the sample cell containing the gas to be detected; the light after the first beam combination and the mid-infrared light carrying the gas information are combined to obtain light after the second beam combination, frequency conversion processing is carried out, and then a near-infrared light comb is output; and processing the quantum correlation light beam and the near-infrared light comb which are matched in time, and outputting a double-light comb signal. Through combination of a quantum correlation mechanism and a frequency conversion technology, the intermediate infrared spectrum detection signal-to-noise ratio is remarkably improved, and high-sensitivity and high-speed parallel quantum enhanced spectrum is realized.

The invention relates to the field and discloses application of terahertz waves or intermediate infrared in preparation of adoptive T lymphocytes. The Terahertz wave or mid-infrared modulation technology is utilized to specifically regulate and control the functions of the T cells in a flowing irradiation mode, and the functions of the T cells from different sources are enhanced under the conditions that no medicine is used and no exogenous gene is introduced. Terahertz wave or mid-infrared stimulation is applied to the T cells in a flowing irradiation mode, specific terahertz wave or mid-infrared frequency for remarkably enhancing the functions of the T cells is determined in a frequency screening mode, and after the optimal irradiation frequency is determined, the T cells with the most remarkable function improvement are further input back into a donor. The T cells stimulated by terahertz waves or mid-infrared rays can play a powerful immune function in a tumor microenvironment so as to inhibit further development of tumors.

The invention discloses glass with spectral selectivity, a window and an optical design method, and belongs to the technical field of glass. The glass with spectral selectivity comprises a radiation cooling layer, a photon structure regulation and control layer and a substrate which are sequentially arranged from the outer side to the inner side, the outer side is a heat energy incidence side, and the inner side is a side needing temperature control; the mid-infrared light emissivity of the radiation cooling layer is greater than or equal to 90%; the photonic structure regulation and control layer is designed based on an effective medium theory and optical topology transformation, and meets the following optical properties: the reflectivity to an ultraviolet band is greater than or equal to 80%, the transmittance to a visible light band is greater than or equal to 75%, and the reflectivity to a near-infrared band is greater than or equal to 80%. Independent and accurate management of ultraviolet, visible light and near-infrared bands can be achieved, meanwhile, the radiation cooling layer conducts active heat dissipation, and indoor temperature control balance is maintained.

The invention provides a laser chip temperature real-time measurement and defect detection system, which comprises an infrared thermal imager, a photoelectric detector, a temperature control platform and a main control computer, the temperature control platform provides a stable chip operation environment, the photoelectric detector detects the occurrence of early COD through the change of the reflectivity of a cavity surface, and the main control computer detects the defect of the chip. The thermal infrared imager captures thermal radiation signals on the surface of the chip in real time so as to monitor temperature distribution changes, judge the occurrence of dark line defects and position the dark line defects, the thermal infrared imager and the photoelectric detector are respectively connected with the main control computer, and signals and data are transmitted to the main control computer. And carrying out data processing and visualization by virtue of analysis software, and finally realizing accurate monitoring of the whole process of chip defects from early formation to evolution expansion.

The invention discloses an all-silicon-based medium optical thin film and an all-fiber laser, and relates to the technical field of optical thin films, the number of layers of the optical thin film is 15, and the structure of the optical thin film is ML (HL) 6M; h represents high-refractive-index material silicon hydride or amorphous silicon, L represents low-refractive-index material silicon oxide, M represents high-refractive-index material silicon nitride, (HL) 6 is a 12-layer reflecting film stack, and ML and M respectively form anti-damage film stacks on two sides. On the premise that the thickness is reduced and the anti-laser-damage effect is improved, effective adaptation of a middle-infrared band pumping source is achieved, and the problems that an existing optical thin film is large in thickness, poor in anti-laser-damage effect and incapable of effectively adapting to the middle-infrared band pumping source are solved; and secondly, electric field distribution can be optimized, so that the optical thin film has more excellent spectral performance. And thirdly, the laser can be directly deposited on the optical fiber end face to serve as an endoscope, and the technical problem that an existing optical fiber laser is complex in structure is solved.

The utility model relates to the field of pipeline project quality detection, in particular to a pipeline project quality detection device which comprises a support, a spectrum module and a fog-penetrating lens which are arranged on a frame, and a self-cleaning module is arranged on the frame. The multispectral detection is more accurate and reliable than a single means, a scientific basis is provided for maintenance and management, the fog-penetrating lens can penetrate fog and dust to obtain a clear image and avoid blind area misjudgment caused by environmental interference, the industrial high-definition camera is matched with the fog-penetrating lens and the industrial high-definition camera to form a multidimensional detection system and provide rich and visual data, and the permanent magnet synchronous motor II drives the support to drive the support. The detection angle can be flexibly adjusted, the inner wall of the pipeline can be covered in all directions, the problem of omission caused by angle limitation is avoided, and the detection comprehensiveness and efficiency are improved.

The invention discloses a mid-infrared laser based on three-device on-chip integration and a preparation method thereof, relates to the crossing field of a semiconductor laser technology and an optical communication technology, and solves the problem that the existing quantum cascade laser QCL technology cannot give consideration to both high modulation rate and high power. An intermediate infrared laser comprises a QCL unit, an EAM unit and an SOA unit which are sequentially arranged on a substrate. The substrate comprises a semi-insulating InP (Indium Phosphate); the QCL unit, the EAM unit and the SOA unit share the same ridge-shaped waveguide structure and grow through epitaxy butt joint. The method provided by the invention is suitable for a mid-infrared band space communication scene with high requirements on the laser modulation rate, the output power and the single-mode stability.

This utility model relates to the field of steel door technology and discloses a safety protection structure for preventing hand pinching in steel cleanroom doors. The structure includes a door frame, a support frame fixedly connected to the top of the door frame, a motor fixedly connected inside the support frame, an elliptical wheel fixedly connected to the drive end of the motor, a sliding shaft fixedly connected to the top of the elliptical wheel, a connecting rod slidably connected to the outer wall of the sliding shaft, a fixed shaft rotatably connected to the inner wall of the connecting rod, a rotating block fixedly connected to the outer wall of the fixed shaft, and a rotating shaft rotatably connected to the top of the rotating block. In this utility model, an infrared sensor controls the motor to drive the elliptical wheel to rotate, stopping the cleanroom door from rotating and causing it to rotate outwards. When an object moves away from the vicinity of the cleanroom door, the motor reverses, the sliding shaft slides to the end of the groove, and the connecting rod drives the rotating block to reset, achieving the anti-pinch function. This structure also provides safety protection; even when the door is stopped, it can still rotate in the opposite direction to prevent objects from getting stuck, thus improving the protection level.

The application discloses a chain-like core-shell structure crystal and a preparation method and application thereof, the crystal is chloroethyl HDABCO-sodium bromofluoroborate, a structural formula of the crystal is [CH2ClCH2N(CH2CH2)3NH]4·[(Na6Br)(BF4) 13 ], a molecular structure presents a one-dimensional chain framework with infinite extension, adjacent chains are connected through N-H...F linear hydrogen bonds and chloroethyl-HDABCO, so that the compound has polarity and has a mid-infrared second-order nonlinear effect. In addition, the ultraviolet band edge absorption of the material is close to the near ultraviolet region, so that the material is expected to be close to inorganic ultraviolet nonlinear optical materials. The crystal is obtained through room temperature volatilization crystallization, has good thermal stability, and has potential application values in the fields of laser frequency doubling conversion, electro-optic modulators, deep ultraviolet nonlinear optics and shutter used for high-speed photography.

The present invention relates to the technical field of thermal imaging of mid-infrared focal plane detectors, and more particularly relates to a method for preparing a mid-infrared focal plane detector based on Sn-doped PbSe quantum dots. The mid-infrared focal plane detector is prepared on a readout integrated circuit (ROIC) substrate, and is composed of an Au bottom electrode, a PbS hole transport layer, a Sn-doped PbSe photosensitive layer, and a PIN heterojunction of a ZnO electron transport layer sequentially constructed by an ion beam sputtering method, a spin-coating method, a spin-coating method, and an ion beam sputtering method, respectively, and an indium tin oxide (ITO) top electrode finally evaporated by an ion beam sputtering method.

A kind of mid-infrared supercontinuum light source of spatial light structure, comprising: pump source, for generating pump light;Collimating lens, for collimating pump light, output parallel light;Grating pair, by two grating parallel placement, for according to frequency to the light input to grating pair Spectral splitting is realized and the optical path of each frequency light is changed, output transmission light to roof prism;It is also used for the light that returns to grating pair from roof prism by original road to be compounded and pulse compression is realized, output compressed light to reflector;Roof prism, for the light that transmits grating pair is reflected again and transmits grating pair;Reflector, for reflecting the compressed light;Focusing lens, for focusing the compressed light reflected by the reflector;Fluoride fiber, the compressed light after focusing of focusing lens is spatially coupled into fluoride fiber at focal point, output mid-infrared supercontinuum laser.The utility model discloses in spatial light coupling system using grating pair compression pulse, the further widening of supercontinuum is realized.

This application provides a layered, environmentally friendly waterborne radiative cooling coating composition, belonging to the field of radiative cooling. The coating composition includes a waterborne radiative cooling primer, a topcoat, and a clear coat. The primer comprises 20-50 parts of a first waterborne emulsion, 10-20 parts of a narrow bandgap optical scatterer, and 10-20 parts of a wide bandgap optical scatterer. The topcoat comprises 20-50 parts of a second waterborne emulsion and 30-60 parts of a wide bandgap optical scatterer. The clear coat comprises 20-50 parts of a third waterborne emulsion. This coating utilizes a synergistic layering of primer / topcoat / clear coat and optimized wide bandgap filler gradation to achieve high solar reflectivity and mid-infrared emissivity at a thinner film thickness, resulting in significant passive cooling. The all-waterborne system disperses and dries at room temperature, resulting in low energy consumption and no VOC risk. The layered structure enhances adhesion, weather resistance, and self-cleaning properties. Compared to high-filler thick-coating processes, this application saves raw materials, energy consumption, and construction steps, extends maintenance cycles, and reduces total life-cycle costs.

This invention discloses a 2.3 μm fiber laser based on 980 nm laser pumping, relating to the field of mid-infrared fiber laser technology. This fiber laser utilizes fluorotellurate glass fiber co-doped with thulium and erbium ions as the gain medium. It absorbs the 980 nm pump light energy by introducing erbium ion doping, and then achieves Tm through the energy transfer process between erbium and thulium ions. 3+ of 3 H4- 3 The population inversion of the H5 energy level ultimately yields laser output in the 2.3 μm band. This invention utilizes a high-power 980 nm laser as the pump source and a thulium-erbium co-doped fluorotellurate glass fiber prepared by the rod-tube method as the gain medium. By writing fiber gratings with appropriate reflectivity at both ends of the fiber, a resonant cavity with a reflection wavelength of 2.3 μm is constructed, enabling the development of a high-power 2.3 μm laser that can operate stably for a long time.

This invention discloses an antimony compound multi-wavelength laser material, its preparation method, and its applications. It relates to the field of semiconductor laser technology and solves the problems of existing antimony compound-based semiconductor laser materials, such as difficulty in achieving multi-wavelength laser emission through single epitaxial growth, and the complex epitaxial processes, limited interlayer interface quality, and insufficient precision in composition control of existing multi-wavelength laser materials. The antimony compound multi-wavelength laser material provided by this invention comprises, from bottom to top, a substrate, a monolayer of graphene, a buffer layer, a lower confinement layer, a lower waveguide layer, a dielectric layer, a quantum well structure, an upper waveguide layer, an upper confinement layer, and a capping layer; wherein the quantum well structure includes In… x3 Ga 1‑x3 As y3 Sb 1‑y3 And Al x4 Ga 1‑ x4 As y4 Sb 1‑y4 Laser materials can be used to fabricate mid-infrared semiconductor lasers, achieving selective epitaxial growth, multi-channel spectral acquisition, and broadband coverage through single-epitaxy and controlled photolithography patterns.

Systems and methods for sensing vibrational absorption induced photothermal effect via a visible light source. A Mid-infrared photothermal probe (MI-PTP, or MIP) approach achieves 10 mM detection sensitivity and sub-micron lateral spatial resolution. Such performance exceeds the diffraction limit of infrared microscopy and allows label-free three-dimensional chemical imaging of live cells and organisms. Distributions of endogenous lipid and exogenous drug inside single cells can be visualized. MIP imaging technology may enable applications from monitoring metabolic activities to high-resolution mapping of drug molecules in living systems, which are beyond the reach of current infrared microscopy.

The application provides an in-situ detection method and system for acetylene in oil based on coated hollow core fiber enhancement, relates to the technical field of optical gas sensing, and specifically captures and enriches acetylene molecules from transformer oil flowing through a selective adsorption film modified on the inner wall of a coated hollow core fiber, so that the local concentration of the acetylene molecules in the coated hollow core fiber sensing probe detection is increased by tens of times, the enriched acetylene molecules are excited by high-frequency modulated mid-infrared pump laser, the periodic photothermal effect generated is sensitively detected by in-phase transmission near-infrared detection laser in the form of phase change, the super-high sensitivity detection can be maintained, the fast response meeting the early fault warning requirement is also satisfied, differential detection is simultaneously performed on the signal generation, temperature compensation, filter adjustment and frequency adjustment are simultaneously performed, the four-stage linkage processing mechanism is utilized to perform hierarchical processing on the signal, so that the whole system can not only resist wide temperature range and strong electromagnetic environment, but also adaptively resist time-varying field interference.

The invention relates to a quantum cascade laser emitting a polarized TM optical mode with a wavelength between 3 and 15 µm, comprising an amplifying medium and a main waveguide. The latter includes a coupling section in contact with the amplifying medium, comprising a diffraction grating (DFB). The coupling section has a width greater than or equal to a minimum width from which an antisymmetric supermode propagating in a laser guidance structure comprising the amplifying medium and the main waveguide has a confinement factor in an active region of the amplifying medium strictly greater than those of the optical modes capable of being guided by the guidance structure. The main waveguide comprises a core based on atoms from column IVA of the periodic table of elements and a confinement subshell of SiN or a chalcogenide. (See Figure 1A for the abstract.)

The invention provides a visible light transparent-mid-infrared low-emissivity composite material and a preparation method thereof. The visible light transparent-mid-infrared low-emissivity composite material sequentially comprises a base layer, an anti-rust paint layer, a first transparent resin layer, a plasmon nano functional filler layer and a second transparent resin layer from inside to outside, the light transmittance of the composite material at the wave band of 400-700 nm is greater than 80%, and the infrared emissivity at the wave band of 8-14 [mu] m is less than 0.55. The light transmittance of the composite material in the wave band of 400-700 nm is larger than 80%, the infrared emissivity of the composite material in the wave band of 8-14 microns is smaller than 0.55, and high visible light transparency and low intermediate infrared emissivity of the material can be both considered; and a transparent material system can be effectively introduced on the premise that the structural stability and the process feasibility of the plasmon nano functional material are ensured, so that the synergistic compatibility between the plasmon nano functional material and the transparent material system is realized.

A vibrationally enhanced fluorescence microscopy system includes a narrowband pulsed mid-infrared laser configured to excite selected chemical bond vibrations in a sample. A continuous-wave visible laser is coaligned with the mid-infrared laser and configured to induce fluorescence from at least one fluorescent reporter bound to the sample. An external pulse generator temporally synchronizes emission of the mid-infrared pulses with emission of the visible laser. A reflective objective is arranged to deliver the mid-infrared pulses to a focal plane within the sample. A water-immersion objective is coaxially aligned with the reflective objective and arranged to collect the fluorescence from the focal plane. A photon-counting detector is coupled to receive the collected fluorescence. Control electronics are configured to output a vibrational-contrast signal derived from counts produced by the photon-counting detector.