121 results about "Non linear optical materials" patented technology

An active gain region sandwiched between a 100% reflective bottom Bragg mirror and an intermediate partially reflecting Bragg mirror is formed on a lower surface of a supporting substrate, to thereby provide the first (“active”) resonator cavity of a high power coupled cavity surface emitting laser device. The reflectivity of the intermediate mirror is kept low enough so that laser oscillation within the active gain region will not occur. The substrate is entirely outside the active cavity but is contained within a second (“passive”) resonator cavity defined by the intermediate mirror and a partially reflecting output mirror, where it is subjected to only a fraction of the light intensity that is circulating in the gain region. In one embodiment, non-linear optical material inside each passive cavity of an array converts an IR fundamental wavelength of each laser device to a corresponding visible harmonic wavelength, and the external output cavity mirror comprises a Volume Bragg grating (VBG) or other similar optical component that is substantially reflective at the fundamental frequency and substantially transmissive at the harmonic frequency. The VBG used in an array of such devices may be either flat, which simplifies registration and alignment during manufacture, or may be configured to narrow the IR spectrum fed back into the active resonant cavity and to shape the spatial mode distribution inside the cavity, thereby reducing the size of the mode and compensating for any deformations in the semiconductor array.

The present invention provides pulsed lasers which employ carbon nanotubes, particularly layers of carbon nanotubes, as saturable absorbers, mode lockers or for Q-switching elements. The present invention also provides methods and materials for mode-locking and Q-switching of lasers in which carbon nanotubes are employed as non-linear optical materials and/or saturable absorbers which facilitate mode-locking and/or Q-switching. The invention further provides mode locker and Q-switching elements or devices which comprise one or more layers containing carbon nanotubes which layer or layers function for mode locking and/or Q-switching.

Crystalline non-linear optical films for nonlinear-optics applications are provided. One such crystalline non-linear optical film includes a substrate and an alignment layer material disposed on said substrate. The alignment layer includes elongated polymeric molecules aligned in a substantially uniaxial direction. Further, at least one non-linear optical material is disposed on the alignment layer.

A photonic switch according to the present invention may be formed using one of a selected group of non-linear optical materials. Each of the materials within this group has a refractive index that demonstrates a substantial peak as a function of wavelength, where the peak occurs at a wavelength distinct from the wavelength of the input signal. A method of producing a photonic switch according to the present invention includes fabricating source and drain waveguides using micro-molding or micro-contact printing processes, or MIMIC (micro-molding in capillaries) of a UV-curable polymer. If desired, a gate waveguide may also be formed in part by these processes. The photonic switch also includes a photonic crystal formed from non-linear optical material, which may be formed, for example, using a block copolymer and nanoparticle composite in a MIMIC or μfluidics process. Such a process may employ a functionalized mold material to align the blocks.

Speckle effect in imaging applications is reduced by generating additional speckle patterns on the screen such that the speckle patterns are overlapped and the overlapped speckle patterns average out on the screen to appear as a noise background to the viewers. The speckle patterns are generated by discrete optical signals of a visible frequency comb. A visible frequency comb having discrete optical signals is generated through modulation-instability processes, phase-conjugation processes, and Bragg-scattering processes using a non-linear optical material and a wavelength converter.

The invention relates to a blue light emitting functional material and the application, which relates to star shooting shape oligomer blue light emitting functional material and the application. The material is monodisperse star shooting shape oligomer on the basis of minami carbazolyl element, the oligomer has the structure of a general formula 1, the material contains minami carbazolyl element, has monodisperse star shooting shape three-dimensional space structure, is easy to form stable amorphous state, and displays excellent filming property and light emitting property. The material has potential application in the fields such as organic electroluminescence, organic laser, organic non-linear optical material and the like. Particularly, organic electroluminescent devices which utilize the functional material to be blue luminescent material have improved luminescent brightness, device efficiency, color purity and spectroscopic stability.

The present invention discloses process of preparing nanometer TTF-TCNQ material. The process includes the following steps: 1. dispersing and dissolving TTF in normal hexane to form normal hexane solution of TTF; 2. dispersing and dissolving TCNQ in acetonitrile to obtain acetonitrile solution of TCNQ; and 3. adding the acetonitrile solution of TCNQ into normal hexane solution of TTF while stirring to obtain nanometer TTF-TCNQ material. The present invention synthesizes 1D nanometer TTF-TCNQ material as organic conductor, realizes the controllable growth of nanometer particle, and can obtain nanometer material with different controllable forms and structures. The preparation process is simple and high in yield, and the prepared nanometer material may be applied widely in sensor, field emission plane display, field effect device, non-linear optical material, piezoelectric material and other fields.

Macromolecules in the shape of three-dimensional kites, barbells, and other shapes are disclosed. The shaped macromolecules are prepared the reaction of one or more dendritic polymers and a linear polymer. The kite-shaped macromolecules are dendritic polymers attached at either their focal points or at an outer to a long carbon chain group. The barbell macromolecules have dendritic polymers at either end of the molecule, which polymers are connected together through the focal points of each by a suitable connecting substituent such as a linear polymer. The shaped macromolecules are used in specialty medical and technological applications including such as drug delivery agents, imaging materials, molecular devices, thin film devices, surface modifiers, transport agents, compatibilizers, rheology control agents, molecular ball bearings, molecular dipoles, non-linear optical materials, medical imaging agents, membrane and cell modifiers, complexing agents, adhesives, interface strengthening agents, and the like.

The invention relates to a preparation method of photocatalysis materials of biomorphic fine hiberarchy. Nanometer titanium dioxide of biomorphic fine hiberarchy used as a photocatalysis material is obtained on the basis of the synthetic technology of biological templates by combining solvothermal technology, adopting butterfly wings with fine hiberachy as the material of the biological template and conducting solvothermal dipping treatment after pre-treating and activating the butterfly wings, as well as conducting ignition oxidation treatment. The preparation method is simple in process andlow in cost, and the obtained titanium dioxide nanometer material with biomorphic fine hiberarchy has excellent photocatalysis performance. The method can also be used for preparing air-sensitive andpressure-sensitive elements, non-linear optical materials, solar cells, environment purifying materials and the like, and the obtained materials have broad application prospect in the fields such as electronic and electrical industry, industries, environment protection, etc.

A process for preparing the 2-mercapto benzothiazole cluster compound of transition metals features use of 'reflux method' with high output rate. Said cluster compound can be used for non-linear optical material and sulfurizing promoter.

An attenuated phase shift mask is formed using a non-linear optical material for both fiducial features and pattern features. The non-linear optical material selected has predetermined transmission at the actinic exposure wavelength and a smaller transmission at the fiducial recognition wavelengths.

A spiro-based compound containing cyclopentaphenanthrene and fluorene, which is used for an organoelectroluminescent device and an organoelectroluminescent device having the spiro-based compound. The spiro-based compound containing cyclopentaphenanthrene and fluorene can be easily manufactured to have high solubility, high color purity, and good thermal stability. The spiro-based compound containing cyclopentaphenanthrene and fluorene is suitable as a substance for an organic film, in particular, an emission layer of an organoelectroluminescent device. Further, the spiro-based compound containing cyclopentaphenanthrene and fluorene can be used as an organic dye, or an electron material such as a non-linear optical material.

The invention discloses a preparation method of a carbon nano tube/polymer/semiconductor nano particle composite material. The preparation method of the material comprises the following steps of: wrapping sodium polystyrene sulfonate and two or three types of semiconductor nano particles on a multi-walled carbon nano tube in sequence from inside to outside; modifying the surface of the carbon nano tube with a polymer in a wrapping and electrostatic adhesion manner; and performing in-situ depositing of the semiconductor nano particles on the carbon nano tube through a solvent thermal method. The nano composite material prepared by the method disclosed by the invention has better non-linear optical property and is a good non-linear optical material; in addition, according to the preparationmethod disclosed by the invention, the carbon nano tube does not need to be oxidized in advance, so that the integrity of structure and property of the carbon nano tube is protected very well; moreover the preparation method also has many advantages that the operation is simple and raw materials have low cost and are easy to obtain; and therefore, the preparation method is suitable for industrialproduction and practical application.

A photonic switch may be formed using one of a selected group of non-linear optical materials. Each of the materials within this group has a refractive index that demonstrates a substantial peak as a function of wavelength. The photonic switch includes a positive gain, and thus acts as a photonic transistor. In addition, a photonic switch is formed so that a gate signal is applied in a direction that is substantially perpendicular to the direction of the input signal so that there is no effective contamination of the input signal by the gate signal affecting the output signal.

The present invention belongs to the field of functional composite material, is especially one kind of composite granular nanometer metal shell/silica core material and its preparation process and use, and relates to method of solving the coagulation problem of nanometer powder of the nanometer metal shell/silica core grains. Nanometer silver shell produced in thermal decomposition reaction is compounded and assembled to the surface of nanometer silica grain to form the composite shell/core material. Nanometer silver coated silica has combined characteristics of both silver and silica, and has light weight, optical non-linearity and low radiance. The composite granular nanometer metal shell/silica core material may be used as the active component in automobile catalyst, and in non-linear optical material, surface plasma vibrator material, etc.

The invention discloses a non-linear optical material, namely a lead bismuth phosphate crystal, and relates to the field of non-linear optical materials. A chemical formula of lead bismuth phosphate is Pb3Bi (PO4)3; the molecular weight is 2230.98; the lead bismuth phosphate belongs to a cubic crystal system; the space group is I43d; and single-cell parameters, namely alpha, beta and gamma are 90.00 degrees, and Z is equal to 2. The lead bismuth phosphate crystal is prepared by adopting a high-temperature solid-state method. The lead bismuth phosphate has excellent non-linear optical performance; a powder secondary harmonic generation (SHG) coefficient of the lead bismuth phosphate is three times that of potassium dihydrogen phosphate (KDP); and the lead bismuth phosphate crystal can be used for deep water communication of submarines, laser blinding weapons, marine fish detection, optical disk recording, color laser printing, laser projection televisions, and optical computing or optical fiber communication.

The invention discloses an azobenzene polypeptide block copolymer, a preparation method thereof and application thereof. One block of the azobenzene polypeptide block copolymer is an azobenzene radical-containing polymer and one block of the azobenzene polypeptide block copolymer is a polypeptide shown as the formula, wherein the number of methylene in an azobenzene radical is x which is equal to 2 to 9. The preparation method of the azobenzene polypeptide block copolymer comprises the following steps of: preparing the azobenzene radical-containing polymer, namely a homopolymer, by an atom transfer radical polymerization method; preparing the polypeptide by homopolymerizing an amino acid or an amino acid derivative compound; and connecting the azobenzene radical-containing polymer and the polypeptide through a click chemistry process to form the azobenzene polypeptide block copolymer. The method has the advantage that the azobenzene polypeptide block copolymer with a novel structure is prepared by the preparation method which is simple and feasible and in which the advantages of the click chemistry are fully used; and the azobenzene polypeptide block copolymer can be applied in the fields of non-linear optical materials and special photoresponse and storage devices and has wide application prospect.

The invention relates to color-changing polyurethane acrylic dyestuff resin and a preparation method. According to the color-changing polyurethane acrylic dyestuff resin, a double-bond-containing polyurethane dyestuff prepolymer is prepared from macromolecular polyol, polybasic isocyanate, a dyestuff and a hydroxyl acrylate monomer through step-by-step polymerization; then an initiator and an acrylate monomer are added and are subjected to solution polymerization to prepare the color-changing polyurethane acrylic dyestuff resin. The color-changing dyestuff is very stable and has a bright color; the obtained polyurethane acrylic dyestuff resin has an obvious photochromic property; the defects in the aspect of application of a small molecular azo dyestuff and limitation to an application field are overcome; the dyestuff is joined in a polymer molecular chain through a chemical bonding manner and the advantages of the dyestuff of friction resistance, migration resistance, staining resistance, gloss retention, safety in utilization and the like are obviously improved. The synthesized polyurethane acrylic dyestuff resin has excellent performance of polyurethane and acrylate. The color-changing polyurethane acrylic dyestuff resin has excellent thermal stability and processing performance, and has a wide application prospect in the fields of advanced materials including information storage and protection materials, liquid crystal displays, non-linear optical materials and the like.

The invention provides an optical crystal bismuth cadmium borate compounded by three chromophores, and relates to the field of non-linear optical materials. The chemical formula of the bismuth cadmium borate is Cd3BiO(BO3)3, and the molecular weight is 851.05; the bismuth cadmium borate belongs to a monoclinic system, and the space group is Cm; the unit cell parameters are that: a is 8.044(2), b is 15.913(5), c is 3.4891(10) angstrom, alpha is 90.00 degrees, beta is 100.08(2) degrees, gamma is 90.00 degrees, V is 439.7(2) angstrom<3>, and Z is 2. The non-linear optical crystal bismuth cadmium borate is prepared by a high-temperature solid state method. The bismuth cadmium borate has excellent non-linear optical performance, and the second harmonic generation (SHG) coefficient of the bismuth cadmium borate powder is six times that of potassium dihydrogen phosphate (KDP).

This invention discloses a kind of the azo monomer has intramolecularly push-and-pull electron structure and its polymer three order nonlinear optics material, after azo-coupler reaction of substituent aniline and N, N- ethyl hydroxyl ethyl aniline gaining the azo midbody, and reacts with (methyl) chlorine chloride then gains the crylic acid ester monomer with the functionality azo base group, and using the atom free radical polymerization (ATRP) method get the azo side chain type polymer whose molecule chain forms the push-and-pull electron structure. The polymer has good three order nonlinear optics functions and fairly good film function.

The invention discloses a 5,10,15,20-tetra-aryl diphenanthrene (9,10-b:9,10-1)-22,24-diseleno porphyrin compound which is obtained by the reaction of phenanthro-pyrrole and 2,5-di(aryl hydroxyl methyl) selenophen under low temperature and catalysis of BF3 Et2O in anaerobic atmosphere. The Soret spectral bands of the compound appear in 521nm, compared with tetraphenyl diseleno porphyrin without conjugated aromatic ring at beta-site, the Soret spectral bands are red shifted by 52nm and enter a green light zone above 500nm. The compound has wide application prospects in such areas as photodynamics therapy photosensitizer, OFETs (organic field effect tubes), molecular antenna, light energy converter, optical conversion material, molecular switch, molecular logic gate, molecular wire, organic solar battery, organic electroluminescence, non-linear optical material, optical storage, molecular identification and medicine and so on.

Disclosed is a waveguide type optical device utilizing a nonlinear refractive index change according to a large 3^rd order nonlinear optical phenomenon. The waveguide type optical device includes a signal beam waveguide through which a signal beam propagates; and a pump beam waveguide through which a pump beam propagates, wherein the pump beam waveguide is disposed adjacent to the signal beam waveguide so that the pump beam can be coupled to the signal beam waveguide, the signal beam waveguide is made of nonlinear optical materials with large 3^rd order nonlinear optical property and the pump beam waveguide is made of linear optical materials, and the wavelength range of the signal beam is different from that of the pump beam. By such a structure, the pump beam is coupled to one arm of the signal beam waveguide, thereby generating a 3^rd nonlinear phenomenon on one arm of the waveguide through which the signal beam passes. Therefore, the waveguide optical device which implements an all-optical communication device operating as an optical device and can be integrated is provided.

An integrated biplane optical sensing core chip has a non-linear optical substrate, a first waveguide structure, a second waveguide structure and a waveguide coupled fiber. The non-linear optical substrate, the first waveguide structure and the second waveguide structure are made of the same nonlinear optical material. The first waveguide structure is connected to the second waveguide structure via a waveguide coupled fiber is outside and independent to the non-linear optical substrate. Therefore, the first waveguide structure and the second waveguide structure can overlap in the vertical direction, and can be set close to each other in the horizontal and vertical directions, so the integrated biplane optical sensing core chip can be miniaturized and can meet reciprocity. The integrated biplane optical sensing core chip is suitable for an optical fiber sensor, and the optical fiber sensor can be a fiber-optic gyroscope or a fiber-optic current sensor.