摘要:
According to one aspect, the invention relates a spectral band-pass filter, which is optimized for the transmission of an incident wave at at least a first given central wavelength λ 0 , and which includes: a metal grating having a thickness (t) greater than approximately λ 0 /50 and including at least a first set of substantially identical, parallel slots having a width ( W ) less than around λ 0 /10, and being spaced apart periodically or quasi-periodically according to a first period that is less than said first central wavelength, a layer of dielectric material having a thickness (h) and a given refractive index (n g ), which is coupled to the metal grating to form a waveguide for the waves diffracted by the grating, said first period of the grating being designed such that only orders 0 and ± 1 of a wave having normal incidence and a wavelength λ 0 are diffracted in the layer of dielectric material, the assembly of the dielectric layer and grating being suspended, during use, in a fluid having a refractive index of close to 1.
摘要:
According to one aspect, the invention relates to a microbolometer array for thermal detection of light radiation in a given spectral band, comprising a supporting substrate and an array of microbolometers (300) of given dimensions, arranged in an array. Each of said microbolometers comprises a membrane (301) suspended above said supporting substrate, said membrane consisting of an element (305) for absorbing the incident radiation and a thermometric element (304) in thermal contact with the absorber, electrically insulated from said absorber element. The absorber element comprises at least one first metal/insulator/metal (MIM) structure comprising a multilayer of three superposed films of submicron-order thickness i.e. a first metallic film (311), a dielectric film (310), and a second metallic film (309), said MIM structure being able to have a resonant absorption of said incident radiation at at least one wavelength in said spectral band. The area of the microbolometer pixel covered by said membrane (301) is less than or equal to half of the total area of the microbolometer pixel.
摘要:
The invention relates to a method for producing a photosensitive device comprising: - a first step of preparing, on a substrate (3), at least one first photosensitive portion (1), active in a wavelength range, the first portion (1) being surrounded by a second inactive portion (2). A material (8) covering the first portion (1) is selectively arranged in a hydrophilic layer by means of an electrochemical process. The second portion (2) comprises, on an upper surface opposite the substrate, a hydrophobic material. The method also comprises the following steps: spraying, on the upper surfaces of the first (1) and second (2) portions, a liquid solution comprising a transparent material, and forming a convergent lens (4, 14) comprising the material on top of the first portion.
摘要:
The invention concerns a method for producing a light concentrating photovoltaic system, comprising: a first step of producing, on a substrate, a first photovoltaic cell array from a stack of layers deposited on the substrate, the cells of the first array being linked to a first group of electrical connectors, a second step of forming a light concentrating system on top of the cells of the first array. It further comprises: a third step, prior to the second step (S3) at least, of forming, on the substrate, a second photovoltaic cell array from a stack of layers deposited on the substrate, the cells of the second array being interposed with the cells of the first array and linked to a second group of electrical connectors, and not provided with a light concentrating system.
摘要:
According to one aspect, the invention relates to an absorbent nanoscale structure (1, 1') of the asymmetric MIM type intended for receiving a broadband incident lightwave, the absorption of which in a given spectral band it is desired to optimize, comprising a dielectric layer (10) which absorbs in said spectral band, which layer is of subwavelength thickness and is placed between a metal grating (11) of subwavelength period and a metal reflector (12). The elements (110, 120) forming the metal grating have at least one dimension (w) suitable for forming, between the metal grating and the metal reflector, beneath the elements of the grating, a plasmon resonator forming a longitudinal Fabry-Perot cavity resonant at a first wavelength of the desired absorption spectral band, and the absorbent layer has, between the metal grating and the metal reflector, at least a first thickness (t a ) suitable for forming at least a first vertical Fabry-Perot cavity resonant at a second wavelength of the desired absorption spectral band.
摘要:
One aspect of the invention relates to a photovoltaic component (10) comprising a set of layers suitable for the production of a photovoltaic device, of which at least a first layer (101) is made from a conductive material in order to form a rear electric contact, a second layer (102) is made from a material that is absorbent in the solar spectrum, and a third layer (106) is made from a transparent conductive material in order to form a front electric contact. The component also comprises an electrically insulating layer (103) disposed between the rear electric contact and the front electric contact, said layer being discontinuous such that the layers of the layer assembly can be stacked in one or more areas (100) in order to form a photovoltaic active zone in each of these areas. The component further comprises a layer (104) of conductive material, which is in electric contact with the aforementioned third layer of transparent conductive material and which is structured to form a peripheral electric contact for each of the photovoltaic micro-cells.