31 results about "Nanolaser" patented technology

The invention belongs to the technical field of agricultural machinery and intelligent control, and particularly relates to an intelligent precise weeding robot based on multispectral recognition. The robot aims at solving the problems that in the prior art, due to visible light morphological recognition, the forms of crops and weeds are similar, and the recognition precision is low and the robustness is poor in the complex field environment. The robot comprises an autonomous mobile platform and a sensing operation assembly, the sensing operation assembly integrates a multi-mode sensing unit, a data fusion and decision core and a high-energy thermal ablation module, and the multi-mode sensing unit provides eight narrow-band pulse light with specific wavelengths through an active light source illumination module. Realizing synchronous acquisition of spectrum and space information by combining multispectral imaging and three-dimensional profile measurement; the data fusion and decision core performs registration, segmentation and classification on multi-source data to generate weed target coordinates; and the high-energy thermal ablation module implements 1470-nanometer laser accurate ablation based on the coordinates, and verifies the operation effect in real time through coaxial infrared thermal imaging. By means of the technical scheme, high-confidence-coefficient distinguishing and millimeter-level lossless precise weeding of crops and weeds in the complex farmland environment can be achieved.

The invention belongs to the technical field of photo-thermal water evaporation films, and discloses a Janus-structure photo-thermal evaporation film for seawater desalination and a preparation method of the Janus-structure photo-thermal evaporation film. The Janus film is obtained by treating a composite film solution through a non-solvent induced phase separation method and a nano laser etching technology. The preparation method comprises the following steps: dissolving phthalazinone polyarylethersulfone ketone in N-methyl pyrrolidone, cooperating with nano molybdenum disulfide to prepare an upper layer of the photo-thermal super-hydrophobic water evaporation double-layer film, and dissolving quaternized phthalazinone polyarylethersulfone ketone in N-methyl pyrrolidone to prepare a hydrophilic lower layer of the water evaporation double-layer film. According to the prepared water evaporation thin film material, the super-hydrophobic upper surface and the hydrophilic lower layer are achieved through surface laser etching, meanwhile, the water evaporation thin film material has excellent photo-thermal performance in a full-spectrum area of sunlight, and the water evaporation rate is excellent under irradiation of 0.8 sunlight intensity and a 60-degree wide angle.

The invention discloses a photostimulation artificial cochlea which comprises an in-vitro machine and an implant, the in-vitro machine is divided into a sound processor and a transmitting coil, the in-vivo implant is divided into a receiving coil, a decoder and a nano laser, and the sound processor is used for processing sound signals and generating corresponding current parameters; the transmitting coil is used for transmitting a radio-frequency signal carrying a current parameter to the in-vivo implant by utilizing electromagnetic induction; the receiving coil is used for receiving the radio frequency signal transmitted by the transmitting coil; the decoder is used for analyzing the radio-frequency signal, restoring the radio-frequency signal into an electric signal and sending the electric signal to the corresponding nano laser; the nanometer laser is used for converting a received electric signal into a laser signal, and the laser signal is irradiated to the auditory nerve element through the optical fiber or directly irradiated to realize optical stimulation. According to the invention, efficient and fidelity transmission and processing of sound are realized, auditory definition and spatial resolution of a user are improved, and more natural and comfortable auditory experience is provided for a patient with hearing impairment.

The application relates to a preparation method of a poly-pyrrole-prussian blue hybrid photothermal nanolaser, polyvinylpyrrolidone is added into deionized water and stirred until completely dissolved, pyrrole and potassium ferrocyanide are added into the obtained polyvinylpyrrolidone solution, stirring is uniformly conducted, then ferric chloride hexahydrate is added, sufficient stirring and reaction are conducted, a reaction liquid is obtained, after the precipitation is removed through centrifugation, the supernatant is dialyzed and vacuum freeze-dried, and the poly-pyrrole-prussian blue hybrid photothermal nanolaser is obtained.Compared with the prior art, the method has lower requirements on equipment, mild reaction conditions, is green and environment-friendly, is suitable for large-scale production, the prepared photothermal nanolaser has good photothermal ablation effect under the irradiation of near-infrared light, can significantly inhibit the growth of tumor cells, the photothermal nanolaser also has good oxygen production performance, can decompose hydrogen peroxide to generate oxygen, and can further improve the tumor hypoxic microenvironment and enhance the in-situ thermal ablation treatment effect of the tumor, thereby providing a potential technical means for relieving the tumor hypoxic microenvironment and strengthening the in-situ thermal ablation.

A laser apparatus for generating a sub- 190 nanometer laser beam includes a deep-ultraviolet solid-state laser source to generate an initial deep-ultraviolet laser beam, at least one mid-infrared solid-state laser source to generate at least one respective mid-infrared laser beam, and at least one lithium triborate crystal to generate an output deep-ultraviolet laser beam from the initial deep-ultraviolet and mid-infrared laser beams via sum-frequency generation. Each mid-infrared solid- state laser source includes (a) a holmium-, thulium-, or chromium-doped gain crystal or gain fiber or (b) an optically-pumped semiconductor gain material to generate the respective mid-infrared laser beam. The laser apparatus may be configured for continuous-wave and pulsed operation, thus offering versatile solutions for applications requiring DUV laser radiation below 190 nanometers. Advantageously, the present approach relies on lithium triborate. Lithium triborate crystals can be grown with the quality and dimensions needed for industrial applications.

The application belongs to the technical field of nanometer laser, and discloses a two-dimensional perovskite topological photonic crystal laser, which comprises a two-dimensional perovskite film, the two-dimensional perovskite film is bounded by triangular domain walls, and a first energy valley photonic crystal and a second energy valley photonic crystal are arranged in the inside and outside respectively to form a laser cavity, the first energy valley photonic crystal comprises a plurality of first hexagonal air holes, the second energy valley photonic crystal comprises a plurality of second hexagonal air holes, the centers of the first hexagonal air holes and the second hexagonal air holes are arranged in a triangular lattice shape, and the directions of the first hexagonal air holes and the second hexagonal air holes are opposite, so that the topological properties of the first energy valley photonic crystal and the second energy valley photonic crystal are opposite. The application has high Q value and is robust to defects or impurities.

The application discloses a kind of corrosion-resistant alloy steel van body and preparation method, belong to van body technical field, first by to van body blank is carried out normalizing, quenching, tempering treatment after obtaining van body semi-finished product, again to van body semi-finished product is sequentially using picosecond laser and nanometer laser and is etched, after anodic oxidation treatment form porous and uniform oxide layer, by laser cladding method uniform vanadium carbide, titanium carbide coating is formed on surface, the porous structure of oxide film can improve the adhesion of subsequent coating, form oxide film plus coating composite protection system, increase the corrosion resistance of corrosion-resistant alloy steel van body, prolong the service life of corrosion-resistant alloy steel van body in slurry pump.

The invention provides a preparation method of a memristor based on nanometer laser direct writing, and relates to the technical field of memristor preparation. An adhesion layer and a copper film are deposited on a high-resistance silicon substrate by adopting a direct current magnetron sputtering method; forming an electrode pattern on the copper film through a photoetching process; constructing a metal-oxide-metal bridging structure in an unetched region between the electrode patterns by adopting a nano laser direct writing technology; and performing electroforming processing on the device after laser processing, and activating the memristive behavior.

This invention discloses an extremely strong field confinement laser based on a coupled nanowire pair. It comprises a pair of side-by-side nanowires forming a nanoscale slit between them; a light beam illuminating the nanowires; the nanowires emit light upon illumination, the emitted light is confined around the slit and propagates along the slit, is amplified by stimulation, and is emitted as the laser's output light. This invention achieves ultra-strong optical field confinement down to approximately 0.3 nm by assembling two nanowires into a coupled nanowire pair, thereby forming an all-dielectric cavity with a slit structure approximately 1 nm wide, providing a novel approach to realizing nanolasers with sub-nanometer field confinement.

This invention relates to a method and apparatus for detecting micromagnetic fields based on magnetic / plasma core-shell nanoparticles and a metal thin film. The method involves constructing a plasma nanolaser possessing both magnetic and plasma properties. The plasma nanolaser comprises a metal thin film layer, magnetic / plasma core-shell nanoparticles, and a liquid gain dye medium. The plasma nanolaser is placed in the external magnetic field to be measured, and the plasma nanolaser is excited. By observing the change in the wavelength of the plasma nanolaser, the change in distance between the magnetic / plasma core-shell nanoparticles and the metal thin film layer is determined, thereby detecting the intensity and intensity change of the external magnetic field. The magnetic field detection apparatus provided by this invention has the advantages of high sensitivity, stable performance, low noise, and low power consumption when detecting external magnetic field intensity, providing convenience for detecting micromagnetic fields.

The invention discloses a sensing mechanism and method based on nano laser, and the method comprises the following steps: (1) selecting and matching a luminescent material which needs to meet the following conditions: the luminescent material is a marker capable of being used for luminescent sensing and also can be used as a gain medium of a nano laser; (2) energy level matching and optimization between all light-emitting molecules used in traditional sensing based on light-emitting signal intensity change as a nano laser gain medium and a surface plasmon structure; (3) obtaining a nano laser signal based on the surface plasmon array and the luminescent material system; and (4) the sensing based on the nano laser signal has higher sensitivity and resolution compared with the traditional sensing based on the intensity change of the light-emitting signal. The intensity of the nano laser in the invention is influenced by the intensity of the luminescent substance. The mechanism is disclosed for the first time, and compared with traditional luminous intensity sensing, nano laser has high sensitivity and resolution due to the ultra-narrow linewidth, and will play an important role in the future optical sensing technology.

The application relates to the field of photoelectric resonators, and discloses a photoelectric resonator with quantum multifunction, which comprises a photoelectric resonator carrier structure.In the application, current is collected by a plurality of light-emitting diodes through a wire and is emitted by ceramic nanometer laser lamps and wavelength double laser lamps in a red light resonator to form light beams with wavelengths of 660 nm, 700 nm and 850 nm respectively, and the red light absorption rate is calculated by an algorithm configured in a central controller when the red light resonator is triggered to work, the heating treatment can be ensured to be carried out in an optimal state by adjusting the heating according to the real-time monitoring of the red light absorption rate, the efficiency of the treatment is improved, when the electric heating sheet is heated, heat is transferred to liquid mercury through conduction, the temperature of the mercury is increased, the liquid mercury between the electric heating sheet and the anti-seepage film is expanded in volume after being heated, the liquid mercury inside the anti-seepage film is more attached to the treatment area of a patient, can be used for heating the treatment area and promoting blood circulation, and on the other hand, the heating area and the attachment degree of the heating area can be increased, so that the human body absorption is further promoted.

The invention provides a scheme and a research device of a nano laser with a low threshold and a tunable wavelength at room temperature. The nano laser comprises a pump light source, a surface plasmon array providing a nano optical cavity, and a gain medium (working substance). The specially-made coaxial variable-angle research device is not only used for collecting nanometer laser signals, but also used for controlling continuous tuning of nanometer laser wavelengths. Different from an ultra-low temperature working environment or ultra-high energy pulse laser as a pumping source in the prior art, the ultra-low threshold nano laser at the room temperature is realized by adopting a method for optimizing the quality factor and the mode volume of the plasmon nano optical resonant cavity. Compared with the prior art, the invention provides a brand-new method for obtaining the low-threshold nano laser at room temperature, and provides an experimental device for developing the nano laser with a simple structure, and the experimental device has important significance for deep research and wide application of the nano laser in the future.

The present invention relates to the technical field of laser devices, and provides a multi-wavelength medical laser system. The system in the present invention comprises: a femtosecond laser, a large-numerical-aperture focusing lens group, a deep ultraviolet nanosecond laser, a beam compensator, a first laser transmission apparatus, a first reflector, a second laser transmission apparatus, a laser light positioning apparatus, an eye-tracking system, and an operating microscope. The deep ultraviolet nanosecond laser generates deep ultraviolet laser light having a wavelength ranging from 190 to 213 nm. The femtosecond laser generates femtosecond laser light having a wavelength ranging from 800 nm to 1100 nm. The first reflector is capable of reflecting the femtosecond laser light and transmitting the deep ultraviolet laser light, or alternatively, the first reflector is capable of reflecting the deep ultraviolet laser light and transmitting the femtosecond laser light, so that a single instrument is capable of both utilizing the deep ultraviolet laser light for precise corneal ablation and employing the femtosecond laser light to perform cutting within the intermediate layer of the cornea. Multiple instruments and patient transfer are not needed during treatment, thereby simplifying a treatment procedure and improving the treatment efficiency.

The invention discloses a wavelength-adjustable hybrid plasmon micro-nano laser based on TPP and SPP, and belongs to the technical field of lasers, and the wavelength-adjustable hybrid plasmon micro-nano laser comprises a one-dimensional photonic crystal heterostructure based on surface plasmon and Tamm plasmon polariton mode coupling; the one-dimensional photonic crystal heterostructure is formed by stacking a plurality of layers of thin films and sequentially comprises a metal layer, a dielectric spacer layer, a distributed Bragg reflector (DBR) and a substrate from top to bottom. According to the invention, hybridization of two different optical modes is adopted, so that the interaction between surface light and substances is enhanced. Compared with a TPP mode and an SPP mode, the hybrid mode solves the problem of large metal loss and improves the Q value. In the application of the laser, the high Q value characteristic and the Purcell effect of a hybrid mode are utilized, and a four-level gain system is introduced to effectively compensate the loss, so that the laser threshold is remarkably reduced, and the problem that the plasmon laser threshold is too high is solved.

The invention discloses a defect-enhanced nanoprobe for colon cancer tumor microenvironment specific activation as well as a synthesis method and application thereof, and belongs to the technical field of nanomaterials. The nanoprobe disclosed by the invention can be specifically triggered and responded by H2S and H < + > overexpressed in a colon cancer tumor microenvironment: on one hand, ferrous ions are released, generation of active oxygen in cells is triggered through a Fenton reaction, and ferroptosis is induced; on the other hand, iron vacancy defects are generated in situ to change the electronic structure of the material, and the near-infrared second-region plasma absorption performance is remarkably enhanced by improving the charge separation efficiency. Under 1064-nanometer laser irradiation, the enhanced vacancy defect can cause rapid local temperature rise, NIR-II photothermal therapy is achieved, and meanwhile hydrogen sulfide is consumed to achieve blood vessel normalization and improve the tumor oxygenation state. According to the research, the activated vacancy defect engineering driven NIR-II PTT / ferroptosis cooperatively consumes hydrogen sulfide, so that accurate targeted intervention on the colon cancer tumor microenvironment is realized, and finally, an excellent anti-tumor effect is achieved.

The application discloses a wavelength-controllable hybrid plasmonic micro-nano laser based on TPP and SPP, and belongs to the technical field of lasers, comprising a one-dimensional photonic crystal heterostructure based on coupling of a surface plasmon and a Tamm plasmon mode; the one-dimensional photonic crystal heterostructure is stacked by multiple thin films, and from top to bottom, the one-dimensional photonic crystal heterostructure comprises a metal layer, a dielectric spacer layer, a distributed Bragg reflector (DBR) and a substrate. The application adopts hybridization of two different optical modes, and enhances the interaction between surface light and matter. Compared with the TPP mode and the SPP mode, the hybrid mode solves the problem of large metal loss, and improves the Q value. In the application of the laser, the high Q value characteristic and the Purcell effect of the hybrid mode are utilized, and a four-level gain system is introduced to effectively compensate for the loss, so that the laser threshold is significantly reduced, and the problem of high threshold of the plasmonic laser is solved.

The invention provides an up-conversion luminescent nano-enzyme carrier, a preparation method and application in the field of cancer diagnosis and treatment. The nano-enzyme takes calcium fluoride as a matrix and is co-doped with ytterbium (Yb), erbium (Er), manganese (Mn) and bismuth (Bi) ions, and the chemical structural formula of the nano-enzyme is CaF2: Yb, Er, Mn and Bi. The nano-enzyme provided by the invention has efficient peroxidase-like activity and degradability, and can emit super-bright red visible light through up-conversion under the irradiation of 980 nm laser. Meanwhile, bismuth and manganese metal doping introduces a new impurity energy level for a calcium fluoride matrix, and the calcium fluoride matrix is endowed with semiconductor characteristics. And interestingly, by virtue of the enzyme-like catalytic activity and up-conversion luminescence mediated photocatalytic treatment of the nanomaterial, and the magnetic resonance imaging function mediated by manganese ions released after degradation of the nanomaterial, the nanomaterial can be used as a biologically safe diagnosis and treatment integrated nano platform. In addition, the preparation method is simple, convenient and high in yield, and has a wide prospect in the field of accurate and efficient diagnosis and treatment of serious diseases such as malignant tumors.

The invention belongs to the technical field of photo-thermal super-hydrophobic films, and discloses a super-hydrophobic film with photo-thermal ice preventing and removing performance and a preparation method of the super-hydrophobic film. The super-hydrophobic thin film is obtained by treating a composite thin film solution through a non-solvent induced phase separation method and a nano laser etching technology, and the composite thin film solution comprises phthalazinone polyarylether sulfone ketone, polydimethylsiloxane, nano molybdenum disulfide and N-methyl pyrrolidone. The preparation method comprises the following steps: dissolving phthalazinone polyarylether sulphone ketone in N-methyl pyrrolidone, and cooperating with nano molybdenum disulfide to prepare the photo-thermal super-hydrophobic anti-icing and deicing film. The anti-icing and deicing film material prepared by the preparation method disclosed by the invention realizes the functions of superhydrophobicity on the upper side and heat insulation on the lower side through surface laser etching, has excellent photo-thermal performance in a full-spectrum region of sunlight, and can achieve an anti-icing and deicing effect under the irradiation of 0.1 sunlight intensity at the temperature of 20 DEG C below zero.

1. The name of the design product: split ultraviolet nanolaser. 2. The use of the design product: for product marking and removal of metal or non-metal plating. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present invention relates to a high-resolution wide-angle nano-LiDAR scanner system with a multi-active mirror array, comprising: a LiDAR central control unit, which is connected to each function unit included in a LiDAR, outputs respective corresponding control signals according to parameters and embedded, installed and operated programs, and monitors and records an operating state; a laser pulse output unit for outputting a laser pulse signal of a specified frequency at a specified level according to the corresponding control signal of the LIDAR central control unit; an atomic nano-scan unit which receives the laser pulse signal applied from the laser pulse output unit according to the corresponding control signal of the LIDAR central control unit, and which outputs the laser pulse signal by adjusting the scanning range of the laser pulse signal by means of a vertical vibration mirror means that actively and vertically vibrates and a rotary polygonal mirror means that actively rotates; and a first laser filter unit which receives the laser pulse signal having a scanning range adjusted from the atomic nano-scan unit, and which outputs a laser pulse signal by blocking noisy laser pulse signal. Therefore, the present invention has a simple LiDAR configuration, relatively low production time and costs, excellent resolution, high scanning speed, and a wide scanning range.

The invention belongs to the technical field of nano laser, and particularly relates to a quasi-two-dimensional perovskite one-dimensional topological laser, which comprises a quasi-two-dimensional perovskite gain layer, a plurality of periodically arranged first photonic crystals are arranged on one side of the quasi-two-dimensional perovskite gain layer, and a plurality of periodically arranged second photonic crystals are arranged on the other side of the quasi-two-dimensional perovskite gain layer. Each period of the first photonic crystal comprises two first TiO2 layers located on the outer side and a first SiO2 layer located between the two TiO2 layers, and each period of the second photonic crystal comprises two second SiO2 layers located on the outer side and a second TiO2 layer located between the two second SiO2 layers. A quasi-two-dimensional perovskite one-dimensional topological laser is constructed, so that the laser performance can be greatly improved, and high-Q-value laser with robustness to defects or impurities is realized.

The application relates to the technical field of lasers, in particular to a preparation method of an addressable silicon-based integrated nanometer laser and the laser, which comprises the following steps: sequentially growing a transition layer and an epitaxial layer on a silicon wafer substrate; obtaining a plurality of grooves on a P-face contact layer through photoetching and developing, growing a metal layer in the grooves, and obtaining a P-face electrode; leaving a gap between the P-face electrodes, etching the epitaxial layer downwards along the gap, over-etching to an N-face contact layer, and forming an N-face electrode through hole; and firstly depositing TiN in the N-face electrode through hole, then depositing metal tungsten, and filling the N-face electrode through hole. By growing a laser epitaxial structure on the silicon substrate, combining a process technology route of a 65nm node of a silicon-based integrated circuit, a brand-new process route of a silicon-based nanometer laser is given, and the compatibility of the laser with CMOS front-end and back-end processes is exhibited.

This invention relates to a flexible nanolaser and its fabrication method. The flexible laser nanolaser comprises a flexible polymer cladding layer and a dielectric material waveguide layer. The flexible polymer cladding layer is a flexible polymer substrate with a flexible polymer hole array. The dielectric material waveguide layer comprises a top dielectric material thin film layer and a dielectric material pillar array structure filling the holes in the flexible polymer hole array. In this invention, the flexible laser nanolaser is excited by optical pumping, generating guided mode resonance in the dielectric material waveguide layer, thereby amplifying the light and ultimately generating laser light. The flexible nanolaser of this invention has good bending resistance and can still function normally after deformation under stress, and can be applied to fields such as bio-implantable detection, flexible optoelectronic integrated devices, and wearable mechanical interaction devices.

The application discloses a quasi-bound state realization method based on symmetry breaking and area compensation and belongs to the technical field of micro-nano photonic devices. In view of the problem that the resonance wavelength is deviated when the quasi-bound state is realized by symmetry breaking, the application provides a dielectric metasurface unit cell supporting a symmetry-protected continuous domain bound state, adjusts the size of the air hole to introduce an asymmetric parameter to break the symmetry, and simultaneously implements area compensation to maintain the stability of the resonance wavelength, including compensation modes in the horizontal direction, the vertical direction or the bidirectional direction. The method can stabilize the quasi-bound state resonance wavelength near 1417.5 nanometers, the deviation is only 1 nanometer, and the quality factor can be adjusted in the range of 10³ to 10⁹, and can be used for high-sensitivity sensing and nanolaser.

The application relates to a wavelength real-time adjustable nanolaser light source and a wavelength tuning method, and the wavelength tuning method is performed according to the following method: constructing a plasmonic nanolaser with magnetic and plasmonic characteristics, wherein the plasmonic nanolaser comprises a metal film layer, magnetic-plasmonic core-shell nanoparticles and a liquid gain medium; an external magnetic field coil is arranged at the periphery of the plasmonic nanolaser, a magnetic field is generated through the external magnetic field coil, the distance between the magnetic-plasmonic core-shell nanoparticles and the metal film is adjusted, and the plasmonic laser wavelength is tuned. The method provided by the application can realize real-time regulation and control of the wavelength of the plasmonic nanolaser in the visible light and near-infrared regions, and has the advantages of non-contact regulation and control, long service life, high sensitivity and precision, real-time wavelength tuning and the like.

The application discloses a kind of mid-infrared luminescent sulphohalide glass ceramic containing BaCl2 nanocrystal and its preparation method and application, belong to solid-state luminescent material field.The application contains BaCl2 nanocrystal mid-infrared luminescent sulphohalide glass ceramic, including:GeS2, Sb2S3, BaCl2;The molar ratio of GeS2, Sb2S3, BaCl2 is (58-82) :(12.5-16.5) :(10-25) or (45-73) :(17.5-24.5) :(2-30);The mid-infrared luminescent sulphohalide glass ceramic further includes rare earth sulfide.The mid-infrared luminescent sulphohalide glass ceramic structure is stable, can realize high thermal stability and anti-crystallization performance, and can effectively improve the solubility of rare earth ions in glass matrix, ensure high transmittance and low fluorescence loss in 2-5 μm wavelength range, under 980 nanometer laser pumping, the material can produce strong 2.78 μm room temperature fluorescence output.

The utility model provides a multi-wavelength full-function therapeutic machine, which comprises a 980-nanometer laser, a 1940-nanometer laser, a 532-nanometer laser, a 980-nanometer laser coupler, a 1940-nanometer laser coupler, a 532-nanometer laser coupler, a 980-nanometer laser fiber, a 1940-nanometer laser fiber and a 532-nanometer laser fiber. The 980-nanometer laser is connected with the 980-nanometer laser coupler, the 1940-nanometer laser coupler and the 532-nanometer laser coupler through 980-nanometer laser optical fibers, the 1940-nanometer laser is connected with the 980-nanometer laser coupler, the 1940-nanometer laser coupler and the 532-nanometer laser coupler through 1940-nanometer laser optical fibers, and the 532-nanometer laser is connected with the 980-nanometer laser coupler, the 1940-nanometer laser coupler and the 532-nanometer laser coupler through 532-nanometer laser optical fibers. The power is lower, more electricity is saved, the size is smaller, and the weight is lighter.

The application discloses a CdS / TiO2 / Graphene electrode preparation method based on a laser direct writing technology and application thereof. First, acetylacetone cadmium powder, acetylacetone titanium oxide and polyether sulfone compound are synthesized, laser direct writing is carried out by a nanometer laser action instrument, a CdS / TiO2 / Graphene / ITO electrode is formed, finally, aptamer loaded with aflatoxin B1 is added to the CdS / TiO2 / Graphene / ITO electrode incubated with aflatoxin B1 to assemble a two-electrode system, and then the aflatoxin B1 is tested. The raw material of the application is easy to obtain, the preparation process is simple, and no external voltage is needed in the chemical sensing process. The ratio type sensor has a sensitive response to trace aflatoxin B1, greatly reduces the influence of environmental factors on the sensing process, and has high stability. The application provides a new method for detecting aflatoxin B1, which is high in sensitivity and stable in performance.

The invention relates to the technical field of lasers, in particular to a preparation method of an addressable silicon-based integrated nano laser and the laser, and the method comprises the steps: sequentially growing a transition layer and an epitaxial layer on a silicon wafer substrate; a plurality of grooves are obtained on the P-surface contact layer through photoetching and developing, metal layers grow in the grooves, and P-surface electrodes are obtained; a gap is reserved between the P-surface electrodes, the epitaxial layer is etched downwards along the gap and over-etched to the N-surface contact layer, and an N-surface electrode through hole is formed; tiN is firstly deposited in the N-surface electrode through hole, then metal tungsten is deposited, and the N-surface electrode through hole is filled with the metal tungsten. A brand new silicon-based nano laser process route is provided by growing a laser epitaxial structure on a silicon substrate and combining a process technical route of 65nm nodes of a silicon-based integrated circuit, and the process compatibility of the laser and the front and rear ends of a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) is shown.