128 results about "Broadband absorption" patented technology

The invention relates to the field of super-hydrophobic materials, in particular to a basalt fiber composite material as well as a preparation method and application thereof. According to the composite fabric material provided by the invention, a multistage micro-nano rough surface of the MoS2 nanoflowers and the silver nanoparticles is constructed on the fiber substrate, so that not only is super-hydrophobic self-cleaning realized, but also the anti-icing performance is relatively high, and particularly, rapid heating is realized by combining broadband absorption of the MoS2 nanoflowers and a local surface plasma resonance effect of the silver nanoparticles; and meanwhile, the silver nanoparticles accelerate heat conduction, so that excellent ice melting capability is obtained. The high conductivity of the silver nanoparticles constructs a conductive path, and the layered structure of MoS2 triggers interface polarization, so that the electromagnetic shielding effectiveness of the X wave band is improved. The dual antibacterial mechanism of the MoS2 nanoflowers and the silver nanoparticles also realizes broad-spectrum efficient antibiosis, the preparation method is green and environment-friendly, the cost is low, and the requirements of complex scenes such as wearable electronic equipment, medical protection, polar region protection and national defense can be met.

The invention discloses a metasurface array antenna housing, belongs to the technical field of electromagnetic wave regulation and control, and solves the problem of how to improve the transmittance and absorptivity of a metasurface to electromagnetic waves. Electromagnetic waves with different frequencies resonate on the first metasurface wave-absorbing layer and the second metasurface wave-absorbing layer respectively, so that the electromagnetic waves are absorbed by the lumped resistor. And the metasurface wave-transmitting layer re-radiates electromagnetic waves of a communication frequency band to enable the electromagnetic waves to penetrate through the metasurface unit, and meanwhile, the surface of the metasurface wave-transmitting layer can serve as a metal floor of the first metasurface wave-absorbing layer and the second metasurface wave-absorbing layer due to copper coating. The antenna can be widely used in the scenes of radar stealth, communication antenna integration, electromagnetic compatibility, wireless energy transmission and the like, and has a good application prospect.

The invention discloses a multifunctional broadband metamaterial structure with a polarization independent characteristic and a control method. The structure has a switchable tri-state function and a complete polarization operation capability irrelevant to polarization. By introducing the guide circuit design, three different electromagnetic energy regulation and control modes of second-order filtering, broadband absorption and multi-reflection shielding are efficiently integrated in the same structure, the real broadband performance in the band is realized, and meanwhile, the higher reflection efficiency outside the band is kept. Different from a traditional method which depends on a broadband lossless reflecting layer to expand the transmission bandwidth of an absorption structure, the three arrays are considered as an integral operating system, support three-state switching operation and have real broadband and efficient behaviors.

The invention provides a wave-absorbing material, and belongs to the technical field of electromagnetic wave absorption. The wave-absorbing material comprises a metal reflection bottom layer, a wave-absorbing middle layer and a scattering upper layer, the wave-absorbing middle layer is made of a ferroferric oxide loaded reduced graphene oxide and epoxy resin (Fe3O4 (at) RGO / EP) composite material and used for absorbing electromagnetic wave energy, and the scattering upper layer is of a patterned metasurface structure made of chopped carbon fiber reinforced epoxy resin (SCF / EP). And a phase-regulated two-dimensional periodic array is formed. By arranging a three-layer structure of the metal reflecting layer, the Fe3O4 (at) RGO / epoxy composite wave-absorbing layer and the chopped carbon fiber scattering layer, broadband absorption and directional scattering control of electromagnetic waves within the range of 2-18 GHz are achieved, a stealth function composite material system with dissipation and deflection dual-mechanism cooperative work is formed, the structure utilizes the patterning design of the scattering layer, and the structure has the advantages that the structure is simple, the structure is compact, and the application range is wide. On the basis of the generalized Snell's law, engineering regulation and control of the radar wave reflection direction are achieved by regulating and controlling the reflection phase difference between pattern units, reflection energy is effectively deviated from the main lobe direction of a radar receiver, and therefore the reflection signal intensity of a target in a radar detection system is reduced.

A broadband low-transmittance and high-absorption wave absorption and transmission integrated frequency selection surface comprises three wave absorption layers and two wave transmission layers which are sequentially stacked from top to bottom, and the three wave absorption layers are sequentially divided into an upper wave absorption layer, a middle wave absorption layer and a lower wave absorption layer from top to bottom; the two wave-transparent layers are sequentially divided into an upper wave-transparent layer and a lower wave-transparent layer from top to bottom; the multi-layer composite structure design is adopted, collaborative optimization of the wave absorbing performance and the wave transmitting performance is achieved by combining the two wave transmitting layers on the lower portion and the three wave absorbing layers on the upper portion, through organic combination of the upper layer structure and the lower layer structure, dual performance improvement of broadband wave absorbing and broadband wave transmitting is achieved, and a transition zone between a wave absorbing zone and a wave transmitting zone is greatly reduced.

The invention discloses an electromagnetic shielding technical scheme of a coding superstructure and an optimization design system. The electromagnetic shielding technical scheme comprises a reflectivity setting module which sets a reflectivity threshold according to target shielding performance; the superstructure construction module generates an initial candidate array based on the symmetric unit design; and the parameter optimization module dynamically adjusts the sub-block thickness and the unit ratio k value through a particle swarm algorithm, and realizes 1-18GHz broadband reflectivity optimization in combination with a piecewise evaluation function. According to the invention, through deep fusion of coding superstructure design and an intelligent optimization system, collaborative optimization of electromagnetic loss and phase regulation is successfully realized, and significant technical advantages are formed in key indexes such as broadband absorption, angle adaptability, system efficiency and the like.

The invention discloses a polarization sensitive type broadband absorber based on metal-medium stacking, and relates to the technical field of micro-nano photonic devices and infrared detection. The absorber sequentially comprises a bottom-layer high-loss metal reflecting layer, a multi-layer stacked composite dielectric cavity structure and a top-layer sub-wavelength metal grating from bottom to top, according to impedance matching and interference resonance theories, a broadband absorption substrate is constructed through a multi-layer film structure at the bottom, and light energy is converted into heat energy by utilizing the high loss characteristic of bottom layer metal; plasmon resonance is excited through the top metal grating, the coupling efficiency of TM polarized light is enhanced, and TE polarized light is cut off; the above structural design successfully realizes efficient broadband absorption and high polarization extinction ratio in an infrared band. The structure is simple in design, is compatible with a CMOS technology, and has excellent wide-angle stability. And meanwhile, polarization screening can be realized without an external polaroid, and miniaturization and integration of an infrared detection system are facilitated.

The invention discloses a high-entropy double hydroxide / carbon fiber aerogel electromagnetic wave-absorbing material and a preparation method thereof, and the method specifically comprises the following steps: (1) activating green algae to obtain carbon fibers, and freeze-drying the carbon fibers to obtain aerogel carbon fibers; (2) immersing the aerogel carbon fiber subjected to heat treatment into a high-entropy layered double hydroxide precursor solution for hydrothermal reaction, and obtaining a high-entropy double hydroxide / carbon fiber aerogel material after the reaction; wherein the temperature of the hydrothermal reaction is 115-120 DEG C, and the reaction time is not less than 5 hours; and (3) freeze-drying the aerogel material obtained in the step (2) to obtain a target product. The high-entropy double hydroxide / carbon fiber aerogel electromagnetic wave-absorbing material disclosed by the invention can realize low-frequency absorption of 2.46 GHz under 2 to 8 GHz, and can realize broadband absorption of 12.44 GHz under 2 to 18 GHz.

The application claims a kind of multiband terahertz absorber based on laminated graphene structure, which is a laminated stack structure.The positive terminal of external power supply is connected to two layers of graphene, and the negative terminal is connected to a gold reflection layer.The Fermi energy level of graphene is controlled by voltage.The structure parameters of each layer, graphene and dielectric layer material characteristics are set.The absorber forms multiple absorption peaks in the 1~5 THz frequency band, with a peak absorption rate of over 90%.At 1.60 THz, a narrowband absorption of 93% is achieved, and at 2.54~4.28 THz, a broadband absorption with a relative bandwidth of 51% is achieved.The normalized equivalent impedance at the resonance frequency point is nearly perfectly matched with the free space impedance.The absorber also has good polarization angle insensitivity, with only slight absorption performance attenuation within an incident angle range of 0~60°.The absorption characteristics can also be adjusted by adjusting the key geometric parameters.The application can simultaneously achieve narrowband and broadband absorption, with excellent absorption performance, and is suitable for interference signal filtering in terahertz communication systems.

This invention relates to a method for preparing a broadband absorption hydrogel. The method comprises the following steps: S1, mixing solvent A (N,N-dimethylformamide or acetonitrile) with deionized water to obtain a mixed solvent; S2, adding polyethylene glycol methyl ether acrylate-480 and acryloylmorpholine to the solvent in S1 and dissolving them to obtain a mixed solution; S3, removing dissolved oxygen from the mixed solution in S2, sealing the container, and stirring under ice bath conditions; S4, adding potassium persulfate and N,N,N',N'-tetramethylethylenediamine to the mixed solution after stirring in S3, and sealing the container again; S5, completing the polymerization reaction in the container at 60 °C to obtain the hydrogel. Compared with the prior art, the hydrogel material provided by this invention has improved reflection loss intensity and effective absorption bandwidth performance, thus providing a new perspective for developing highly flexible and efficient electromagnetic wave absorbers.

The invention relates to a preparation method and application of a Ti3C2Tx nano wave-absorbing material with OBO as a surface terminal. The invention belongs to the technical field of wave-absorbing materials. The problem that an existing Ti3C2Tx material is poor in impedance mismatch and electromagnetic wave absorption capacity is solved. The method comprises the following steps: uniformly mixing anhydrous copper chloride, potassium chloride, sodium chloride, anhydrous sodium tetraborate and Ti3AlC2, heating, cooling, grinding, dissolving in an ammonium persulfate solution, stirring, performing ultrasonic treatment, centrifuging and drying. The preparation process is low in cost, simple, green and pollution-free. By changing the surface groups of the Ti3C2Tx material, the dipole polarization is reduced, and the impedance matching is improved. The absorption thickness is 1-2 mm, the effective absorption bandwidth of the wave-absorbing material covers 9-18 GHz, and the broadband absorption target of the material is completed. At the corresponding frequency of 14.24 GHz, when the thickness of the absorbing layer of the wave-absorbing material is 1.36 mm, strong absorption of the wave-absorbing material is realized, and 99.99% of electromagnetic waves can be absorbed.

The invention relates to the technical field of microwave absorption, and discloses a preparation method and application of an iron-cobalt alloy carbon inlaid composite material, the preparation method of the composite material comprises the following steps: S1, taking spinel type iron-cobalt alloy powder as a raw material, adding phenolic resin and a solvent for mixing, and then removing the solvent to obtain an iron-cobalt alloy / phenolic resin homogeneous mixture; s2, heating and curing the iron-cobalt alloy / phenolic resin homogeneous mixture, and then crushing and sieving the iron-cobalt alloy / phenolic resin homogeneous mixture to obtain iron-cobalt alloy inlaid phenolic resin particles; and S3, the material obtained in the S2 is subjected to high-temperature carbonization under the vacuum condition, and the iron-cobalt alloy carbon inlaid composite material is obtained. The FeCo-C / RGO / PLA wave-absorbing wire is prepared by further combining a fused deposition modeling technology, taking the particles as a wave-absorbing phase and compounding the particles with reduced graphene oxide (RGO) and polylactic acid (PLA). The obtained material has the characteristic of broadband absorption, and an innovative solution is provided for electromagnetic pollution treatment in the fields of 5G communication, military stealth and the like.

The invention belongs to the technical field of very long wave infrared detection, and particularly relates to an all-silicon microporous structure for enhancing wide-spectrum absorption in a photon residence mode and a preparation method of the all-silicon microporous structure. The all-silicon micropore structure sequentially comprises a high-purity silicon substrate, a heavily-doped silicon plasma layer, a lightly-doped silicon active absorption layer and an intrinsic pure silicon barrier layer from bottom to top, and further comprises a periodic micropore array structure with a parabola-shaped side wall, and the structure is embedded into the lightly-doped silicon active absorption layer. According to the micropore array structure with the parabola-shaped side wall, coupling of wide-spectrum photons is achieved, and a high-order diffraction mode deviating from the vertical direction is excited; and meanwhile, a heavily doped silicon plasma layer compatible with an all-silicon process is introduced, so that a photon residence mode is successfully realized. Under the combined action of the design, the photon capture efficiency of the thin active absorption layer in a very long wave wide spectrum range is maximized, and the performance of photoelectric devices such as an infrared detector and a solar cell can be remarkably improved.

The invention belongs to the field of stealth materials, and relates to a structural high-strength broadband infrared radar compatible patch and a preparation method thereof. The structure of the patch is designed, and the patch sequentially comprises an infrared layer 1, a first wave absorbing layer 2, a second wave absorbing layer 3 and a back adhesive layer 4 from top to bottom. Wherein the infrared layer 1 is used for achieving the infrared stealth effect of the patch, the first wave absorbing layer 2 and the second wave absorbing layer 3 are used for achieving the radar stealth function of the patch, the first wave absorbing layer 2 and the second wave absorbing layer 3 adopt different types of absorbents, the content of the absorbents and the thickness of the wave absorbing layers are controlled, the absorption frequency band of the patch can be adjusted, and the broadband absorption effect is achieved. Meanwhile, the interface compatibility between the absorbent and the rubber is improved through the coupling agent, and chemical bonds are formed, so that the patch has high mechanical properties; in addition, the patch prepared by the invention also has good environment resistance.

This invention discloses an integrated energy-selective metasurface for electromagnetic shielding and absorption, belonging to the field of electromagnetic protection technology. It comprises a first substrate dielectric substrate, a first metal circuit structure printed on the upper surface of the first substrate dielectric substrate, a second metal circuit structure printed on the lower surface of the first substrate dielectric substrate, a second substrate dielectric substrate, and a third metal circuit structure printed on the upper surface of the second substrate dielectric substrate. The energy-selective metasurface of this invention exhibits energy selectivity in two frequency bands: 1.92GHz–2.05GHz and 4.40GHz–4.46GHz, allowing low-power signals to transmit while reflecting or blocking high-power electromagnetic energy; and achieves a broadband absorption effect with an absorption rate exceeding 95% in the X-band. This invention integrates multi-band energy-selective protection and broadband high-efficiency absorption functions into one device.

The present application relates to the field of optical technology, more particularly to a visible to mid-infrared super-wideband absorber and a preparation method thereof, the method comprising the following steps: self-assembling polystyrene microspheres on a polyimide substrate to form a monolayer hexagonal close-packed structure substrate, and then forming a nano-cone array substrate through ion etching; placing a copper substrate into a coating chamber and introducing argon, and sputtering to obtain a reflection layer; placing a zirconium substrate into the coating chamber and introducing argon and oxygen, and sputtering to obtain a first metal absorption film layer; continuously introducing argon and oxygen, and sputtering to obtain a second metal absorption film layer; continuously introducing argon and oxygen, and sputtering to obtain a third metal absorption film layer; placing an aluminum oxide substrate into the coating chamber, and then introducing argon, and sputtering to obtain a dielectric antireflection layer, thereby forming the absorber. The present application can have extremely high absorption in the visible light and near-infrared regions, and has good angle tolerance, polarization insensitivity, bending resistance and heat resistance.

This invention discloses a broadband duct silencing structure combining perforated tubes and cavities. The structure uses a galvanized housing as its main body, with perforated tubes coaxially arranged inside. A perforated partition divides the structure into front and rear silencing chambers. The front silencing chamber contains a first sound absorber and an air layer, forming a Helmholtz resonant cavity to efficiently eliminate low-frequency fan noise. The rear silencing chamber is filled with a second sound absorber and is equipped with perforated tubes, micro-perforated tubes, and micro-perforated inserts with progressively smaller apertures, forming a gradient microporous structure to achieve broadband absorption of mid-to-high frequency noise. The structure utilizes the airflow in the duct to drive the impeller to rotate, which in turn drives a bidirectional reciprocating screw via bevel gear transmission. This drives a delivery rod and a one-way valve to form a directional airflow circulation. The sound absorber is automatically purged through the air duct and comb-shaped air duct to remove fiber dust, preventing secondary pollution and stabilizing acoustic performance. This invention combines the advantages of low-frequency resonance silencing and mid-to-high frequency gradient microporous sound absorption, featuring a compact structure, wide silencing bandwidth, and stable and reliable operation.

The present invention relates to a corrosion-resistant, lightweight radar-absorbing coating, belonging to the technical field of absorbing coating preparation. Specifically, the coating comprises a topcoat component and an innercoat component. The topcoat component includes the following raw materials: a conductive polymer-epoxy matrix A, composite absorbing particles A, a corrosion inhibitor, and a solvent; the innercoat component includes the following raw materials, in parts by weight: a conductive polymer-epoxy matrix B, composite absorbing particles B, and a solvent. The topcoat utilizes a polypyrrole powder / epoxy matrix composite with a ferrite-based absorber and nano-silicon carbide. The high magnetic permeability of the ferrite and the dielectric loss of the SiC combine to block the conductive network and cover high-frequency waves. The innercoat utilizes a polypyrrole fiber / epoxy matrix composite with carbonyl iron powder / SiC, leveraging the high hysteresis loss of the carbonyl iron and the SiC support structure to achieve low-frequency absorption. Through a gradient conductive structure design and multi-component synergistic optimization, the radar-absorbing coating achieves broadband absorption, corrosion resistance, and lightweight properties.

The invention discloses a low-profile band-pass frequency selective wave-absorbing surface with broadband wave absorption. The low-profile band-pass frequency selective wave-absorbing surface comprises a resistance loss layer, an air layer and a band-pass FSS transmission layer in sequence from top to bottom, the resistance loss layer comprises a first dielectric substrate, a central metal sheet is printed at the center of the upper surface of the first dielectric substrate, an etching groove is etched in the central metal sheet, a parallel LC resonance circuit is formed through the etching groove, the periphery of the central metal sheet is connected with metal bridge arms which are symmetrically distributed in a central rotation mode and extend outwards, and the metal bridge arms are connected with the first dielectric substrate. The tail end of each metal bridge arm is connected with a circular metal sheet which takes the midpoint of the tail end of the metal bridge arm as a circle center, and lumped resistors are loaded on the metal bridge arms; through the single resistance loss layer, loading of the lumped resistor and special slotting of the resistance loss layer, broadband wave absorption with a band-pass window can be realized by using a two-dimensional structure, and the broadband wave absorption device has the characteristics of low profile, easy processing, flexible regulation and control and the like.

The invention discloses a preparation method of an aramid nanofiber / graphitized multi-walled carbon nanotube composite fiber woven body, and belongs to the technical field of electromagnetic wave absorbing materials. According to the invention, the effective loss of electromagnetic wave energy and the cooperative improvement of broadband absorption performance are realized. The method comprises the following steps: by taking aramid nano-fibers as a framework and graphitized multi-walled carbon nanotubes as a loss medium, constructing composite fibers with a microscopic three-dimensional conductive network structure through a wet spinning and sol-gel conversion process, and weaving the fibers to obtain a composite fiber woven body with a macroscopic conductive network. According to the invention, efficient loss and broadband absorption of electromagnetic waves are realized. The method is simple in technological process, low in cost, high in controllability, capable of achieving continuous production and high in industrial feasibility, and the product has high electromagnetic wave loss capacity and wide electromagnetic wave absorption bandwidth. The method is applied to the field of electromagnetic wave absorbing materials.

According to the invention, the existing MR organic molecules are used in the anti-blue light product, so that not only are the defects of broadband absorption, low light transmittance, color cast, instability and the like of the traditional absorption type anti-blue light material improved, but also the overall light stability and durability are improved by utilizing the structural advantages of the MR molecules. The blue-light-resistant transparent base material achieves precise narrow-band protection, long-term stable protection, excellent color reducibility and good compatibility with existing transparent base materials, and is suitable for various blue-light-resistant products such as spectacle lenses, screen protection films, vehicle-mounted glass, lighting lampshades and VR / AR optical elements.

The utility model discloses a metasurface structure for reducing normal incident scattering of an antenna, and the metasurface structure employs a double-layer design, combines an absorption layer and a frequency selection surface layer, and achieves broadband absorption through a periodically two-dimensional unfolded microstrip patch unit and a three-layer resistor loading metal ring. Ansys electromagnetic field simulation software verifies that the structure effectively reduces the radar cross section of the microstrip antenna within the frequency band of 3-10 GHz, and ensures the normal work of the antenna at the same time. Through deep analysis and simulation optimization, key factors influencing the performance are determined, and the balance between the wave permeability and the wave absorbing property is realized. Besides, an adjustable resistance circuit, a reconfigurable mechanism, an intelligent algorithm and a sensor technology are integrated, the stability and the automation level of the antenna performance are further improved, and an effective solution is provided for improving the scattering reduction effect during forward incidence of radar waves.

A method for attaching and detaching electronics structures during integrated circuit manufacturing is disclosed. A stack is formed including a carrier and an electronics structure. Between the carrier and electronics structure, a broadband absorber layer is provided. The broadband absorber layer includes broadband absorber material and polymer. A layer of ultraviolet (UV) light curable adhesive is also provided between the carrier and the electronics structure. UV light is directed through the carrier in order to cure the UV curable adhesive. The electronics structure can be processed while secured to the carrier. The electronics structure is removable from the carrier by transmitting a light pulse from a flashlamp through the carrier to heat the broadband absorber layer. The heat can decompose the polymer to permit removal of the electronics structure from the carrier.

The present invention discloses an intelligent design method and structure for a broadband flexible stealth skin, relating to the technical field of metamaterials and metasurface absorbers. The method includes: designing unit structures of identical size but different internal structures, wherein the unit structures include a first unit structure and a second unit structure, wherein the first unit structure and the second unit structure respectively achieve broadband absorption within different frequency bands; obtaining the reflectivity and phase of the unit structures through simulation calculations, and optimizing the dimensions of the unit structures based on the reflectivity and phase; arranging the two optimized unit structures to obtain a metasurface; and calculating the far-field RCS value of the metasurface using a far-field formula. Based on the drawbacks of some existing flexible metasurface absorbers, which either have too narrow an absorption bandwidth or are unable to operate at low frequencies, the present invention enables metasurface absorbers to operate across a wide frequency band while maintaining flexibility.

The present invention discloses a four-function terahertz metasurface absorber with dual electrical / thermal control and a preparation method thereof. The absorber utilizes a novel structural design of graphene layers and vanadium dioxide layers. The surface comprises an outer square graphene ring, four graphene trapezoids, and an inner square graphene structure, effectively increasing the absorption bandwidth. The absorber also utilizes a dual-control design of graphene voltage and vanadium dioxide temperature. By independently regulating the voltages of the inner and outer graphene patterns, switching between a single-frequency absorption mode and a broadband absorption mode is achieved. Adjusting the temperature of the vanadium dioxide layer allows the absorber to switch between a low-frequency absorption band and a high-frequency absorption band, making the absorber a four-function terahertz metasurface absorber with dual electrical / thermal control. The present invention effectively addresses the current problem of absorbers being unable to regulate absorption bands and absorption modes, opening up a new path for device design in the field of terahertz absorption.

This invention provides a diazobiphenyl dye for thin-film polarizers, which is an analog of AD1. Thin-film polarizers prepared using this dye exhibit good optical quality, such as low light scattering, high dichroism ratio, broadband absorption, and / or stability to heat and light irradiation. This invention also provides a method for preparing the diazobiphenyl dye from two different monoazo dyes via a cross-coupling reaction. This method is eco-friendly because it does not use toxic benzidine as a raw material. The product (diazobiphenyl dye) obtained by this method can be purified in a simple and convenient manner, and the diazobiphenyl dye prepared by this method can have a symmetrical or asymmetrical structure. Furthermore, this invention provides a thin-film polarizer comprising the diazobiphenyl dye and an apparatus for display applications comprising the thin-film polarizer.

The invention relates to the technical field of dichroic dyes, and particularly provides a total anthraquinone type black dichroic dye, a guest-host liquid crystal composition containing the total anthraquinone type black dichroic dye and application of the total anthraquinone type black dichroic dye. The total anthraquinone type black dichroic dye provided by the invention comprises an anthraquinone type orange dye, an anthraquinone type red dye and an anthraquinone type blue dye, each of the anthraquinone orange dye, the anthraquinone red dye and the anthraquinone blue dye comprises a structural formula as shown in a formula (1). The total anthraquinone type black dichroic dye provided by the invention shows remarkable absorption in a visible light broadband range of 400-650nm, not only covers a main interval from purple light to red light, but also keeps relatively stable absorbance in the broadband, and shows broadband absorption characteristics; meanwhile, the average dichroic ratio can reach 11.28, and the optical performance is excellent; and the material also has excellent switching performance between a black opaque state and a transparent state, and can realize rapid reversible switching between the two states under the action of an electric field.

The invention discloses an infrared broadband absorber and a preparation method thereof.The infrared broadband absorber comprises a titanium substrate, a lower loss layer, a middle composite layer and an upper dielectric layer which are sequentially arranged from bottom to top, the middle composite layer is composed of nanorods which are periodically arranged in an array, each nanorod comprises five layers, and the number of the nanorods is five. The titanium nitride layer, the ferric oxide layer, the titanium layer, the ferric oxide layer and the titanium layer are sequentially arranged from bottom to top. According to the invention, through the design of the multi-layer heterostructure and the optimization of the nanorod array, the efficient absorption of broadband infrared light is realized.

The invention relates to the field of semiconductors, and discloses an infrared photoelectric detector, a manufacturing method thereof and electronic equipment, and the method comprises the steps: growing a buffer layer on the upper surface of a substrate; forming an epitaxial structure layer on the upper surface of the buffer layer, and forming a nanowire array structure above the buffer layer; the nanowire array structure comprises a plurality of nanowires, and each nanowire is perpendicular to the upper surface of the buffer layer; forming a transparent conductive layer on the upper surface of the nanowire array structure; and growing a first electrode on the upper surface of the transparent conductive layer, and growing a second electrode to obtain the infrared photoelectric detector. According to the invention, the vertical nanowire array structure has a remarkable quantum effect and excellent photoelectric performance, and has a great absorption cross section and strong light interaction between nanowires, so that the vertical nanowire array structure has the characteristics of low reflection and strong broadband absorption, optical coupling of the infrared photoelectric detector can be increased, and the photoelectric performance of the infrared photoelectric detector can be improved. And the infrared photoelectric detector realizes high light absorption and high quantum efficiency.