Method of conversing optical radiation frequency

FIELD: conversion of optical radiation by using nanotechnology.

SUBSTANCE: transparent nano-particles having volume of 10-15 cm3 are illuminated by white light. Nano-particles are activated by impurity atom with concentration of 1020-1021cm-3 and are strengthened in form of monolayer onto transparent substrate. Nano-particles are made of glass and are glued to substrate by means of optically transparent glue. Substrate can be made flexible.

EFFECT: high brightness of image.

4 cl, 1 dwg

 

The invention relates to the conversion of optical radiation with the use of nanotechnology.

A well-known technique for obtaining monochromatic radiation with the use of nanoparticles and creation on its basis of the color ink. To do this, create a mixture containing spherical nanoparticles of silicon dioxide with a diameter of about 3·10-4mm, conductive polymer gel and the solvent. Under the influence of an electric potential, applied to the so-called "colloidal crystal", affect the degree of interaction between the gel and the solvent and thereby control the spacing between nanoparticles applied on the surface. Through the processes of interference of reflected light from particles acquires a certain monochromaticity [the Journal Nature; http://www.nature. com/nsu/ 030317/030317-1.htm1].

A well-known technique for obtaining monochromatic radiation:

1) does not provide sufficient brightness of light reflected from particles of silicon dioxide,

2) color ink has a dependency on the irradiating light,

3) selection of ink of the same color problem, as the color at the same time depends on the chemical composition of the solvent, the gel and on the applied potential,

4) radiation can be efficiently obtained at an angle of irradiation and reflection of near 90° (in the direction normal to the surface of the ink).

<> The technical challenge is to obtain monochromatic optical radiation by frequency conversion of optical radiation with high radiation intensity in a given range of the optical spectrum with low energy consumption and with the possibility of review of radiation in an arbitrary direction within the hemisphere above the radiating surface.

Applying the method of frequency conversion of optical radiation, characterized by the fact that irradiate white light transparent nanoparticles volume of the order of 10-15cm3activated impurity atoms with a concentration of about 1020-1021cm-3and strengthened in the form of a monolayer on a transparent substrate.

Nanoparticles can be made of glass (silica) and attached to the substrate through an optically transparent adhesive, and the substrate can be made, in particular, flexible.

The method is illustrated shown in figure scheme of interaction between two nanoparticles under irradiation with white light.

Optically transparent, for example, of glass, nanoparticles 1 volume of the order of 10-15cm fixed on the surface of the transparent, for example made of glass substrate 2 using an optically transparent adhesive 3. As an example of such adhesive can serve as NORLAND OPTICAL ADHESIVE. The nanoparticles contain impurity atoms 4 simple substances you the PR which is arbitrary, not associated with choice of color radiation based on technological feasibility of the use of any material, for example, boron, barium, phosphorus.

When the concentration of the impurity atoms 1020-1021cm-3ensembles of atoms interact at distances of about 100 nm. Near the surface of the optical medium, which is created by the substrate, a transparent adhesive and transparent nanoparticles, nanoparticles, aktivirovannyh impurity atoms, there is a significant restructuring of the spectrum of dense ensembles of atoms. Upon irradiation of the nanoparticles white light is observed optical near-field resonance. Mathematical approach to the explanation of the effect of a near-field resonance set forth [in the Journal of Experimental and Technical Physics, 124, No. 3, s-528, 2003, in the journal "Uspekhi Fizicheskikh nauk", 170, No. 11, s-1181, 2000, - / Ongudaiski. The problem of two electrons and nonlocal equations of electrodynamics]. The frequency of secondary radiation (staining) depends on the concentration of impurity atoms. The frequency with near-field resonance in the spectrum of the impurity atoms to the frequency ω0quantum transition of the impurity atoms from the ground state to first excited electronic state is approximately 2. This means that changing the concentration of impurity atoms in the nanoparticles changes the frequency in Orinoko radiation within 2 ω 0. That is, there is a frequency conversion of optical radiation and receiving the secondary optical radiation across the entire visible spectrum from blue to infrared. Impurity atoms can belong to one randomly selected a simple matter to obtain monochromatic radiation of different colors, or an arbitrary set of simple substances. Substrate as the element that creates the surface of the optical medium may be flat, non-flat surface, and flexible.

Impurity atoms in nanoparticles radiate coherently, which explains the large values of the forces of light and the brightness of the radiation of two activated nanoparticles in the near-field interaction. The light intensity pairs nanoparticles is of the order of 1012photons/s and is calculated in accordance with the angle Θ between conditional line R between the centers of adjacent nanoparticles and radiation direction. The direction of irradiation with white light has little effect on the brightness of the secondary radiation. The pattern of secondary radiation is determined by the law of sin2Θ. This means that the radiation activated nanoparticles available for review with the angle of approximately 180°.

The method is characterized by obtaining a monochromatic radiation of high brightness and light intensity, while small by the use of energy. For comparison, the light source into p-n junction in GeAs emit up to 10 watts of light with square 2·10-5cm2. In accordance with the invention, in the same area 2·10-5cm2is about 105activated nanoparticles, which will give an output of about 102W. The brightness of the subpixel is about 500 CD/m2and, for example, far exceeds the brightness full color LEP display (Lijht Emitting Polimer - display) [Computer review, 26 July 1 August 2000]. The light output of sensor from 105the nanoparticles, which is equal to the ratio of the luminous flux in lumens to power consumption in watts at a wavelength of λ=600 nm, approximately 1000 LM/W and is much higher than the efficiency obtained in modern devices based on heterostructures [Yunovich acoustic emission, " Nature, 2001, no. 6, .38-45.]. While power consumption of one subpixel is about 2·10-10W.

The light source of the two activated nanoparticles consumes little energy, since the above optical near-field resonances are linear resonances. Thus, to obtain the intensity of the 1012photons/sec is required, the electric field of the external optical radiation, irradiating a couple of nanoparticles of approximately E0I=10 units of the CGS. For comparison here is meant the e electric field E 0Ithat would have been required for the excitation of all two-level impurity atoms in the two nanoparticles. This field is equal to approximately 106units of the CGS, which is comparable to the intra-atomic fields that must be taken into account nonlinear effects. Therefore, when using low-intensity optical fields to convert the frequency of the optical radiation will be small and the energy absorption in the nanoparticles.

The production of nanoparticles, the activated impurity atoms, is available to the modern technologies. So Kazan physical-technical Institute, Academy of Sciences carries out works on the implantation of atoms in surface and thin film.

Highlight the main advantages of the proposed method.

1. The relative simplicity of the method of frequency conversion of optical radiation and obtaining an optical image based on the effect of optical near-field resonances in the activated nanoparticles. Optical radiation with the corresponding frequencies across the visible optical range is only relevant concentrations of impurity atoms in the nanoparticles.

2. Nanoparticles with impurity atoms are resistant to degradation processes and the influence of radiation. So in LEP-displays there is the problem of delamination of the coating from exposure to water vapor, so it requires special hermetic is here polymeric screen. Another major problem hampering the work of the LEP displays, is the susceptibility of plastics to ultraviolet rays, which discolor it. This problem was tried to be solved through multilayer structures, but longer than 5 years, to extend the life of polymeric display failed. According to Cambridge Display Technology the lifetime of the particles of red, green and blue colors is set to 100,000, 30,000 and 1000 hours, respectively [Computer review, 26 July 1 August 2000].

3. Fabrication of full-color displays that implement the inventive method, can lead to signicant reduction compared with the liquid crystal, polymer, plasma displays, and the deposition of nanoparticles using inkjet technology will make possible the production of panels of different shapes and sizes.

1. The method of frequency conversion of optical radiation, characterized by the fact that irradiate white light transparent nanoparticles volume of the order of 10-15cm3activated impurity atoms with a concentration of about 1020-1021cm-3and strengthened in the form of a monolayer on a transparent substrate.

2. The method according to claim 1, characterized in that the nanoparticles are made of glass.

3. The method according to claim 1, characterized in that the nanoparticles fixed on the substrate through an optically transparent adhesive.

4. The method according to claim 1 characterized in, the substrate is flexible.



 

Same patents:

FIELD: electrochromic devices.

SUBSTANCE: system includes multiple first means positioned at a distance from one another, being in contact with conductive covering and made with possible feeding of electric current to first conductive covering, and multiple second means positioned at a distance from one another, being in contact with second conductive covering and made with possible feeding of electric current to second conductive covering. Multiple first means distanced from one another and multiple second means distanced from one another are positioned along perimeter of window assembly. In addition, window assembly can include controller, made with possible control of feeding of electric current to selected means from multiple first means positioned at a distance from one another and to selected means from multiple second means positioned at a distance from one another, so that coefficient of light penetration through first portion of electrochromic environment is different from coefficient of light penetration through second portion of electrochromic environment.

EFFECT: higher efficiency, simplified construction.

2 cl, 11 dwg

FIELD: measuring equipment.

SUBSTANCE: assembly of electrochromic aircraft window contains: a) assembly of outer window glass panes; and b) assembly of counter-veiling electrochromic glass panes, positioned at a distance from outer glass panes assembly and forming a chamber between them. Assembly of counter-veiling electrochromic glass panes has: first substrate, having first surface, containing first conductive covering, and second surface, containing second conductive covering; second substrate, positioned at a distance from first substrate, while second substrate has first covering, containing third conductive covering, while second surface of first substrate and first surface of second substrate are directed to one another and are at a distance from each other with forming of chamber between them; electrochromic environment in chamber and being in contact with second and third conductive elements, while electrochromic environment has light penetration coefficient, which alters if electric potential is applied to electrochromic environment; means for letting electric current through first conductive covering for heating first conductive covering to prevent veiling of window assembly; and means for letting electric current through second and third coverings to create an electric potential on electrochromic environment and to change light penetration coefficient for electrochromic environment.

EFFECT: higher efficiency.

4 cl, 5 dwg

FIELD: mechanical engineering.

SUBSTANCE: device has signal form generator, power amplifier and electromechanical block, including first fixed magnetic system and first coil of current-conductive wire, additionally included are integrator and corrector of amplitude-frequency characteristic of electromechanical block, and block also has second fixed magnetic system and second coil of current-conducting wire, rigidly and coaxially connected to first coil. Connection of first and second coils with fixed base is made in form of soft suspension with possible movement of first and second coils, forming a moving part of modulator, relatively to fixed magnetic systems, while output of said signal shape generator is connected to direct input of integrator, inverse input of which is connected to speed sensor of moving portion of modulator, output of integrator is connected to input of corrector, to output of which input of said power amplifier is connected.

EFFECT: higher precision.

3 cl, 8 dwg

FIELD: computer periphery.

SUBSTANCE: device has back wall, made of metallic alloy with flowing limit Re = 210-280 N/mm2 and durability limit Rm = 270-410 N/mm2.

EFFECT: lesser dimensions of display, possible utilization with following secondary processing of broken-down bodies of display, higher safety of user, increased durability.

FIELD: computer periphery.

SUBSTANCE: device has back wall, made of metallic alloy with flowing limit Re = 210-280 N/mm2 and durability limit Rm = 270-410 N/mm2.

EFFECT: lesser dimensions of display, possible utilization with following secondary processing of broken-down bodies of display, higher safety of user, increased durability.

FIELD: computer periphery.

SUBSTANCE: device has back wall, made of metallic alloy with flowing limit Re = 210-280 N/mm2 and durability limit Rm = 270-410 N/mm2.

EFFECT: lesser dimensions of display, possible utilization with following secondary processing of broken-down bodies of display, higher safety of user, increased durability.

FIELD: measurement technology.

SUBSTANCE: method is based upon orientation of liquid crystals disposed between two substrates. Diffraction gratings with line frequency higher than 500 lines/mm and height of micro-relief of 0,1-04, mc are formed onto the surfaces of substrates. Gratings are disposed to have gap of 10-50 mc and at random angle. Liquid crystals are oriented along lines of gratings.

EFFECT: improved reproducibility of cell.

Optical isolator // 2256945

FIELD: optical engineering.

SUBSTANCE: optical isolator has magnetic system and magneto-optic rotator placed in magnetic field. Rotator has plates made of magneto-optic material and disposed in series onto optical axis. Angle between optical axis and normal to surface of each plate equals to angle of Bruster. Any subsequent plate is turned around optical axis relatively previous one for angle being equal to angle of turn of plane of polarization of light at previous plate at the direction which coincides with direction of turn of plane of polarization in previous plate.

EFFECT: improved radiation resistance.

2 dwg

FIELD: triple chalcogenide monocrystals designed for using in quantum electronics and optronics.

SUBSTANCE: monocrystal has chemical formula LiGaTe2, three-dimensional tetragonal-symmetry group I42d, lattice parameters a = 6.338Å, c = 11,704Å, volume of elemental cell V = 470.1Å, coordination number Z = 16, density 4.689 g/cm3 and it is grown by Bridgeman-Stockbarger process at preliminary synthesis of compound of elemental components Li, Ga, Te. Monocrystal is suitable for converting laser infrared irradiation from wavelength no less than 520 nm up to wavelength 20 micrometers.

EFFECT: new lithium containing chalcoghenide monocrystals suitable for using in optics of mean range of IR-irradiation.

3 cl, 2 dwg

FIELD: measurement technology.

SUBSTANCE: at least two stable or metastable ordering of liquid crystal are realized. Switching aid which causes the switching of liquid crystal material between switches has aid intended for optical illumination of the device. Device can provide the supply of linear polarized light for inducing torsion in liquid crystal. Alternatively ordering of liquid crystal can be switched by means of aid for supplying second energy, for example, electric field. In this case light serves to generate heat which helps to switching. One or both energy sources can be used locally for switching chosen areas or pixels. Energy levels on bistable substrate can be controlled by using oligomer adding (slippery surface).

EFFECT: improved efficiency of operation.

48 cl, 10 dwg

FIELD: optical signals processing.

SUBSTANCE: device has serially place, along one optical axis, optical coherent radiation source, collimator, ultrasound light modulator, first integrating lens, screen, second integrating lens and line of n photo-detectors, n subtraction blocks, n threshold blocks, adder with weight coefficient, support signal generator, delay line and voltage generator.

EFFECT: lower time for determining photo-detector number with maximum effect.

2 dwg

FIELD: electro-optics.

SUBSTANCE: magneto-optical element provided plane of polarization rotator based on Faraday-effect is made o f single single-axis crystal. Rotator has domains of both orientations in all its stable state without applied external magnetical field. Limits of domains for switching to any other stable state are disposed to move when external magnetic field is applied without forming additional domains.

EFFECT: reduced time for switching domains; reduced sizes of switching elements.

13 cl, 4 dwg

FIELD: fiber-optic and open digital and analog communication lines.

SUBSTANCE: proposed method involves concurrent transfer of two optical data signals over optical communication line, their reception and comparison, and noise suppression. Optical data signals are shaped across output of nonlinear optical element by supplying at least one optical beam to element input and varying input power or phase, or frequency of one optical beam supplied to input of nonlinear optical element, or by varying electric or acoustic field applied to this element. In this way optical change-over between two unidirectional distributed and coupled waves propagating through nonlinear optical element is ensured. Each of these waves at output of nonlinear optical element corresponds to optical data signal. These data signals are supplied to differential amplifier designed for subtracting electric signals and/or to correlator which separates coinciding part of amplitude of these signals as function of time. As an alternative, optical data signals are shaped across output of tunnel-coupled optical waveguides of which at least one functions as nonlinear optical element.

EFFECT: enhanced noise immunity of line, eliminated impact of photodetector noise onto data signal reception.

33 cl, 4 dwg

FIELD: optics.

SUBSTANCE: element has Bragg phase grid, which is formed in electric-optical material or in additional layer applied to it. Grid is provided with means for forming non-homogenous non-periodic outer electric field along direction of optical radiation movement, by means of which diffraction efficiency of grid is determined. Optical elements system has at least two Bragg phase grids, having different periods and placed serially along direction of movement of optical radiation. System of optical elements is controlled by effecting on grids with non-homogenous non-periodic outside electric field.

EFFECT: higher efficiency.

4 cl, 29 dwg

FIELD: measuring equipment.

SUBSTANCE: device has reflector, means for producing image and optical system for projecting image on display, as light source a board with light diodes is used, light flows of which are concentrated on an optical system. Protector is provided with sensor of outer light level and connected to common current adjuster.

EFFECT: broader range of use, higher precision, lower energy consumption.

2 cl, 16 dwg

FIELD: optical instrument engineering.

SUBSTANCE: electro-optic phase modulator has electro-optic chip, transparent electrodes and protective case. Transparent current-conductive electrodes are applied directly onto chip. Electro-optic chip provided with applied electrodes is flexibly fixed between protection glasses and is placed inside protective case.

EFFECT: simplified design; improved reliability.

FIELD: optics.

SUBSTANCE: magnetic device has variable magnetic field source which field is perpendicular to surface of magneto-optic material, and magnetic field source which field is oriented along gradient of magnetization of material. Magnetic field source which field is perpendicular to surface of magneto-optic material is made in form of transparent current-leading structures. One of conductors of the structure crosses center of light beam and the other one - along aperture of light beam in perpendicular to gradient of magnetization. Device permits to take control over location of optic vortexes within diffracted radiation and changes amount of information transmitted by light beam.

EFFECT: improved functional capabilities.

1 dwg

FIELD: optical engineering.

SUBSTANCE: multichannel optical commutator is made of two bunches of optical fibers, two collimators which have their focuses to place bunches' edges of, and light-guiding element mounted between collimators. As light-guiding element either mirrors or two acoustic-optical deflectors are used or their combination. Device allows to connect N users in series, which N user are connected to first bunch to S users which are connected to second bunch and visa versa and to conduct communication between users connected to one bunch.

EFFECT: units of fiber-optic assemblies and telecommunications can be made to provide speed of operation of channel switching within microsecond range and to provide number of switching channels up to 10000 at the same communication unit.

EFFECT: 21 cl, 12 dwg

FIELD: measurement technology.

SUBSTANCE: at least two stable or metastable ordering of liquid crystal are realized. Switching aid which causes the switching of liquid crystal material between switches has aid intended for optical illumination of the device. Device can provide the supply of linear polarized light for inducing torsion in liquid crystal. Alternatively ordering of liquid crystal can be switched by means of aid for supplying second energy, for example, electric field. In this case light serves to generate heat which helps to switching. One or both energy sources can be used locally for switching chosen areas or pixels. Energy levels on bistable substrate can be controlled by using oligomer adding (slippery surface).

EFFECT: improved efficiency of operation.

48 cl, 10 dwg

FIELD: measurement technology.

SUBSTANCE: at least two stable or metastable ordering of liquid crystal are realized. Switching aid which causes the switching of liquid crystal material between switches has aid intended for optical illumination of the device. Device can provide the supply of linear polarized light for inducing torsion in liquid crystal. Alternatively ordering of liquid crystal can be switched by means of aid for supplying second energy, for example, electric field. In this case light serves to generate heat which helps to switching. One or both energy sources can be used locally for switching chosen areas or pixels. Energy levels on bistable substrate can be controlled by using oligomer adding (slippery surface).

EFFECT: improved efficiency of operation.

48 cl, 10 dwg

Up!