207 results about "Optically active" patented technology

A method of fabricating an optoelectronic component, performed on a multi-layered wafer disposed on a substrate. The method comprises the steps of: etching the multi-layered wafer, thereby defining a slab and a multi-layered ridge, the slab having an upper surface below the ridge and being located between the multi-layered ridge and the substrate; selectively epitaxially growing a III-V semiconductor cladding adjacent to a first and second sidewall of the ridge, the cladding layer extending from the upper surface of the slab along the first and second sidewalls, and thereby cladding an optically active waveguide within the multi-layered ridge; and providing a first and second electrical contact, which electrically connect to a layer of the multi-layered ridge and the slab respectively.

The invention relates to an optical system, in particular for microlithography, comprising at least one optical element (100, 200, 300, 400) which has a substrate (105, 205, 305, 405) and at least one optically active layer system (110, 210, 310, 311, 410) located on this substrate (105, 205, 305, 405), and at least one monitoring unit (120, 220, 240, 320, 340) for monitoring a degradation state of this layer system (110, 210, 310, 311, 410), wherein the monitoring unit (120, 220, 240, 320, 340) has a detector (121, 221, 241, 321, 341) for detecting non-directional radiation (130, 230, 330, 430) which is emitted by the optical element (100, 200, 300, 400) during the operation of the optical system.

The disclosure relates to waveguides for transmitting electromagnetic waves, for example image guides for transmitting image information, and to methods of manufacturing waveguides, which operate using transverse Anderson localization and may have an optically active material for improved contrast.

This invention relates to organometallic compounds, compositions comprising the organometallic compound, lithography methods using the organometallic compound, an optical element, optically active device or optical or semiconductor device obtainable by the lithography methods, hard masks obtainable by the lithography method, uses of the compounds or compositions, a method for the preparation of the compound.

The present application discloses a chiral dienyl-substituted carboxylate compound and an asymmetric preparation method thereof, wherein the chiral dienyl-substituted carboxylate compound is an optically active compound with the structure shown in the following formula I, including stereoisomers with the same chemical formula: in the formula, * represents a chiral carbon atom; the substituent R is selected from hydrogen, C 1‑10 alkyl or aryl; Ar is an aromatic ring or a substituted aromatic ring; R 1 , R 2 , R 3 , R 4 , R 5 are independently selected from hydrogen, halogen, C 1‑10 alkyl or alkoxy; R 6 is independently selected from C 1‑10 alkyl or aryl; R 7 is independently selected from C 1‑10 alkyl or aryl. The present application applies a chiral isothiourea catalytic electrochemical synthesis system to precisely and quickly synthesize the chiral dienyl-substituted carboxylate compound in a high yield and high stereoselectivity and in a gram-scale. The preparation method of the present application is simple, and has biomedical practicability and industrial application prospect.

This disclosure provides an optically active nanocomposite material having a textured substrate and a multilayer optical stack comprising multiple nanosheets. The nanosheets may be chiral and composed of materials such as transition metal chalcogenides, MXenes, or nanocarbon. The optically active nanocomposite material exhibits linear birefringence (LB) and linear dichroism (LD), and optionally circular dichroism (CD). The nanocomposite material also exhibits optical asymmetry. g The factor may be greater than or equal to 1. Furthermore, the nanocomposite material exhibits thermal stability, for example, remaining stable at temperatures above or equal to about 250 °C. This disclosure also provides different methods for preparing such nanocomposite materials using a layer-by-layer self-assembly (LBL) process.

This invention provides novel stem cell activators, topical skin agents containing the aforementioned stem cell activators, and skin cosmetics containing the aforementioned stem cell activators. The stem cell activator of this invention comprises at least one compound selected from compounds (including optically active agents) shown in formula (1), salts of the aforementioned compounds, and hydrates thereof as active ingredients. In the following formula, R... 1 R 2 Represents a hydrogen atom or a hydrocarbon group. R 3 Represents a hydrogen atom or an organic group. n represents an integer greater than or equal to 1. The above hydrocarbon groups may have substituents. [Chemical Formula 1]

Optically active devices and processes for preparing such devices are disclosed. A device in accordance with the present disclosure comprises a patterned surface, wherein the patterned surface comprises a plurality of pattern elements, and a plurality of LED light sources each optically coupled and / or radiationally connected to at least one pattern element of the plurality of pattern elements. The plurality of pattern elements comprise at least one optically active material and a photoresist material.

The present application relates to a kind of catalyst composition and its application in catalytic preparation optically active secondary alcohol, the catalyst composition includes chiral ionic bridged aryloxyalkane rare earth complex and additive, the additive is selected from one or more of pyrimidine, N,N-dicyclohexylmethylamine, 4,4'-dipyridyl.The above-mentioned catalyst composition can be used for synergistically catalyzing asymmetric borohydration of chalcone and its derivatives with pinacol borane, and show high catalytic activity and high enantioselectivity, product yield is as high as 99%, ee value can reach 84%, provide a reliable new way for the efficient, high selective synthesis of optically active secondary alcohol.

An optical gate device may have one or more optical cavities. The optical cavity may have an embedded optically-active material providing strong light-matter coupling. A pump input allows application to of a pulsed optical pump beam the optically-active material. The pump beam is absorbed by the optically active material to form an exciton-polariton condensate which emits light. The optical gate device may have an input waveguide to input a seed signal to the optical cavity. The optical gate device may include an output waveguide to output of an optical signal at a wavelength corresponding to a resonant mode of a the cavity. The device may operate in a manner such that, when the pump beam is applied to the pump input, an optical output signal is selectively provided in the output waveguide, via the input of the a seed signal and light emitted by the exciton-polariton condensate.

The invention relates to an adenosine triphosphate optical probe, in particular to an adenosine triphosphate (ATP) optical probe as well as a preparation method and application thereof. Specifically, the invention provides an adenosine triphosphate optical probe, which comprises an adenosine triphosphate sensitive polypeptide and an optically active polypeptide, and the optically active polypeptide is located in the sequence of the adenosine triphosphate sensitive polypeptide.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

To provide a method for obtaining an optically active hydrogen-phosphine borane compound at high optical purity. Also, to provide a method for obtaining an optically active 2,3-bis(dialkylphosphino)pyrazine derivative at high optical purity. Provided is a method for producing an optically active hydrogen-phosphine borane compound comprising carrying out a decomposition reaction of an optically active phosphine borane compound in the presence of a phase-transfer catalyst using an alkaline aqueous solution and an organic solvent. Also provided is a method for producing an optically active 2,3-bis(dialkylphosphino)pyrazine derivative using the optically active hydrogen-phosphine borane compound obtained.

To provide a chromophore useful for being included in a film having electro-optical activity and an electro-optical device.SOLUTION: There is provided a compound represented by formula (A).SELECTED DRAWING: Figure 6A

Provided is a method for efficiently producing a fluorinated alkyl compound by directly converting an aliphatic alkylamine widely existing in nature into a fluorine substituent, the method being characterized in that an alkylamine compound in which at least one amino group is bonded to an alkyl carbon is reacted with a deamination-fluorination agent to produce the fluorinated alkyl compound.

The present invention relates to the fields of biopharmaceuticals and biochemical engineering, and particularly relates to a method for preparing chiral β-trifluoromethyl alcohol compounds using non-heme iron enzyme BsQueD or its mutants. Using non-heme iron enzyme BsQueD or its mutants as catalysts, trifluoromethyl ketone as a substrate, and phenylsilane as a hydrogen source, chiral β-trifluoromethyl alcohol is obtained after the reaction. The amino acid sequence of the non-heme iron enzyme BsQueD is shown in SEQ ID NO.1. It has a high conversion rate (70%) for the substrate trifluoromethyl ketone, high optical activity of the product β-trifluoromethyl alcohol (e.e. value greater than 90%), and high yield, greatly reducing the production cost.

The invention relates to processes for preparing carbaprostacyclin analogues and intermediates prepared from the processes. The invention also relates to cyclopentenone intermediates in racemic or optically active form.

Methods are described for transferring optically active features, such as meta-atoms and diffractive elements formed on a planar surface, to a non-planar surface with high precision. The described methods can be used to fabricate optical devices having meta-atoms or other diffractive features disposed on non-planar surfaces and / or planar surfaces. Related optical systems and components are described.

The application designs a method for preparing optically active methyl fluoropropionate by using diethylamine sulfur trifluoride, comprising the following steps: fluorination reaction: under the protection of nitrogen, methyl S-lactate is added to a dry reaction kettle as raw material, the kettle temperature is cooled to a first reaction temperature, diethylamine sulfur trifluoride is added dropwise into the reaction kettle, after dropping, the reaction kettle is heated to a second reaction temperature, after the reaction is completed, the reaction mixture is added dropwise into saturated sodium / potassium bicarbonate aqueous solution to obtain R-2-fluoropropionic acid methyl ester; the molar ratio of diethylamine sulfur trifluoride to methyl S-lactate is 1-1.5:1, the method is high in efficiency, low in three-waste amount, short in reaction path, suitable for industrial production, and has economic value.

The invention discloses an ionic elastomer photoelectric sensor based on triplet-triplet annihilation up-conversion and a preparation method of the ionic elastomer photoelectric sensor, and belongs to the technical field of functional materials and photoelectric sensing. The photosensitizer and the luminescence agent form a triplet state-triplet state annihilation up-conversion system. The preparation method comprises the following steps: respectively forming the ionic conductive phase and the optical active phase, mixing the ionic conductive phase and the optical active phase to form a homogeneous system, and curing and molding through photo-initiation polymerization. Under the optical excitation condition of a specific wave band, the ion elastomer can generate measurable electric signal output, so that conversion from an optical signal to an electric signal is realized. The flexible photoelectric sensor can be prepared by curing the material on the surface of an electrode, can work under the condition of no external bias voltage or low bias voltage, has the characteristics of good wavelength selectivity, excellent flexibility and stretchability and the like, and has an application prospect in the fields of wearable sensing and flexible electronics.

The invention discloses a highly-doped crosstalk-free optical temperature sensing material based on potassium-based rare earth fluoride, the sensing material is potassium-based rare earth fluoride microparticles with surfaces modified by carbon dots and highly doped with optically active rare earth ions, the general formula of the potassium-based rare earth fluoride is KMF4, and M is an optically inert rare earth element selected from Gd or La; the optical active rare earth ions are selected from Eu < 3 + > or Tb < 3 + >, and account for 1-20 mol% of the total metal ions of the rare earth elements; the average particle size D50 of the sensing material is 5.0 [mu] m to 20.0 [mu] m. The problem of valence mismatch between rare earth ions and a matrix is solved by adopting the KMF4 matrix, high-concentration doping is allowed without quenching, and rare earth characteristic luminescence is remarkably enhanced. Meanwhile, spatial isolation of the surface carbon dots and bulk phase rare earth ions is achieved through the micron particle structure, energy transfer between the surface carbon dots and the bulk phase rare earth ions is thoroughly eliminated, and complete independence of dual-mode light emission is ensured.

According to one exemplary aspect of the present application, there is provided a dielectric polymer film comprising a gap fill material forming composition; also provided are uses of the dielectric polymer films in semiconductor devices, optical elements, and optically active devices. The present application also relates to a method of producing the gap filler material forming composition, and a dielectric polymer film comprising the composition.

The application relates to a non-optically active water quality physicochemical parameter remote sensing estimation method, satellite remote sensing data is periodically inquired, retrieved and downloaded through a satellite remote sensing data service interface; a multi-dimensional feature set is constructed based on sampling time information, spatial position information and multi-band spectral information of the satellite remote sensing data; the multi-dimensional feature set is used as model input, a machine learning model is trained in combination with measured values of non-optically active water quality physicochemical parameters, and remote sensing estimation models of multiple non-optically active water quality physicochemical parameters are established; new measured values of water quality physicochemical parameters are acquired, when the new measured values meet a model updating trigger condition, controlled hot start updating is performed with parameters of a current remote sensing estimation model as initial parameters, and the current remote sensing estimation model is corrected. The method can realize full-link remote sensing monitoring from automatic data acquisition, multi-dimensional feature collaborative modeling to model self-optimization, and high-precision water quality physicochemical parameter remote sensing dynamic monitoring management is realized.

The present invention provides a method for synthesis of a novel covalent organic framework material having a 12-crown-4-ether group based on chiral separation. The novel covalent organic framework material having a 12-crown-4-ether group is prepared in the present invention, and CCOF-HTOD-1 can be used as a fluorescent probe for achieving chiral separation of different chiral drugs (L-PGL, D-PGL, L-PAL, D-TPL, L-TPL and D-TPL). The CCOF-HTOD-1 prepared in the present invention not only has advantages such as a simple preparation method, suitability for large-scale production, a uniform structure for the prepared novel 12-crown-4-ether covalent organic framework material, ease of dispersion, and excellent CD optical activity, but also exhibits excellent performance in detection of various chiral drugs, including high detection efficiency, high selectivity, and recycling. As a result, common problems in chiral drugs, such as difficult separation and low detection efficiency, can be solved thereby.

The invention belongs to the technical field of luminescent materials, and discloses an aluminum-based phosphate structure near-infrared luminescent material and a preparation method and application thereof, the chemical formula of the near-infrared luminescent material is MAl1-xCrxSbP3O12, M is selected from Na or / and Li; 0.02 < = x < = 0.12. The near-infrared light-emitting material is obtained by dissolving optically active Cr < 3 + > in a crystal phase of an MAl1-xCrxSbP3O12 compound with a monoclinic crystal structure and independently doping, the wavelength of an excitation spectrum of the near-infrared light-emitting material is 400-550 nm and 600-800 nm wave bands, the wavelength of an emission spectrum of the near-infrared light-emitting material is 700-1200 nm, and the near-infrared light-emitting material has adjustable full width at half maximum, can meet a wide spectrum, and is suitable for commercial blue light LED chips, such as LED chips, LED chips, LED chips, LED chips and the like. The material is applied to near-infrared fluorescent powder conversion light-emitting diode devices.

The present invention relates to a process for the preparation of optically active 4-substituted 1, 2, 3, 4-tetrahydroquinoline, said process comprising the enantioselective hydrogenation of the corresponding 4-substituted 1, 2-dihydroquinoline in the presence of a chiral iridium (P, S)-ligand catalyst.

A method for manufacturing a lens system, comprising the steps of: providing an injection molding apparatus (1), providing a first lens (3), introducing and fixing the first lens (3) in the injection molding apparatus, closing the injection molding apparatus, introducing injection molding material into the injection molding apparatus for forming a second lens on the optically active surface of the first lens, providing a UV light source, and curing the second lens by UV light radiation from the UV light source, wherein the UV light is radiated onto the second lens (6) through a UV light-transmittable area of ​​a second half-mold (1b) so as to cure the second lens.

The present invention provides industrially suitable processes for preparing intermediates in the production of substituted polycyclic pyridone derivatives having a cap-dependent endonuclease inhibitory activity. In the process as shown below, wherein each symbol is as defined in the specification, an optically active substituted tricyclic pyridone derivative of the formula (VII) is obtained in high yield and high enantioselectivity by subjecting a compound of the formula (III) or (VI) to intramolecular cyclization with controlling stereochemistry to obtain a compound of the formula (IV) having a removable functional group on an asymmetric carbon, and then removing the functional group thereof;

To provide a liquid crystal composition that makes it possible to manufacture a cholesteric liquid crystal element exhibiting high contrast and a reduced response time.SOLUTION: A cholesteric liquid crystal composition comprises: a host liquid crystal composition containing a specific compound as a first component; at least one optically active compound selected from specific compounds as a first additive; and at least one polymerizable compound selected from specific compounds as a second additive, where, based on a mass of the host liquid crystal composition, a content of the second additive is less than 2.0 mass%.SELECTED DRAWING: None

Tunable lens (1) comprising a fluidic volume (2), a flexible membrane (3) and a shaping element (4), wherein the membrane (3) delimits the fluidic volume (2) on one side, the shaping element (4) is attached to the membrane (3), the shaping element (4) surrounds an optically active region of the membrane, the shaping element (4) is arranged to alter optical properties of the tunable lens (1) by deflection, in top view the shaping element (4) has a non-circular contour (40), wherein the contour (40) extends within an imaginary circumcircle (10), and the amount of deflection of the shaping element (4) is proportional to a lateral distance of the contour (40) to the circumcircle (10).