Abstract: The document discloses transferrable hyperbolic metamaterial particles (THMMP) that display broadband, selective, omnidirectional absorption and can be transferred to secondary substrates, allowing enhanced flexibility and selective transmission. A device having metamaterial nanostructures includes a substrate and metamaterial nanostructures engaged to the substrate to form an optical layer to interact with light incident to the optical layer to exhibit optical reflection or absorption or transmission that is substantially uniform over a spectral range of different optical wavelengths associated with materials and structural features of the metamaterial nanostructures, each metamaterial nanostructure including different material layers that are interleaved to form a multi-layer nanostructure.

Abstract: Disclosed is a method for detecting a block chain abnormal behavior based on graph embedding. The method comprises S100: data collection: acquiring public block chain abnormal behavior node data on the Internet, and acquiring normal nodes in a number equal to that of abnormal behavior nodes at the same time; S200: establishment of abnormal behavior recognition model: extracting features of all nodes, constructing the nodes subjected to feature extraction into a transaction graph, and forming the abnormal behavior recognition model based on a graph embedding technology according to the constructed transaction graph; and S300: transaction detection: determining a transaction risk according to the obtained abnormal behavior recognition model when a transaction occurs, and prompting a user of a risk level. According to the method for detecting the block chain abnormal behavior based on graph embedding, abnormal behaviors possibly existing in block chain transactions can be effectively detected and early warned.

Abstract: An apparatus, a method, and an optical device for generating light. A conductive quantum well junction is positioned between a first electrode and a second electrode. The conductive quantum well junction is configured to enter into a resonant state to inelastically tunneling one or more electrons. The conductive quantum well junction may include a first dielectric layer, a third conductive layer, and a second dielectric layer. The third conductive layer may be positioned between the first dielectric layer and the second dielectric layer. The first dielectric layer may be coupled to the second electrode and the second dielectric layer is coupled to the first electrode.

Abstract: The present invention relates to a linkage test apparatus for deepwater drilling riser and hang-off system. The linkage test apparatus includes a motion excitation system, a hang-off system and a riser system. The motion excitation system includes a six-degree-of-freedom excitation platform and sensors. The hang-off system includes a hydraulic cylinder actuating mechanism and a hydraulic system. The hydraulic cylinder in the hydraulic cylinder actuating mechanism is composed of an inner cylinder and an outer cylinder and it is fixed on the six-degree-of-freedom excitation platform by a spider. The inner cylinder of the hydraulic cylinder is hollow. A hang-off joint passes through the center of the inner cylinder, and a bottom of the hang-off joint is connected to the riser system via a rotating flange. The riser system is successively connected by multiple riser test joints, and the bottom is suspended with a lower marine riser package model.

Abstract: The document discloses transferrable hyperbolic metamaterial particles (THMMP) that display broadband, selective, omnidirectional absorption and can be transferred to secondary substrates, allowing enhanced flexibility and selective transmission. A device having metamaterial nanostructures includes a substrate and metamaterial nanostructures engaged to the substrate to form an optical layer to interact with light incident to the optical layer to exhibit optical reflection or absorption or transmission that is substantially uniform over a spectral range of different optical wavelengths associated with materials and structural features of the metamaterial nanostructures, each metamaterial nanostructure including different material layers that are interleaved to form a multi-layer nanostructure.

Abstract: A light emitting diode may include a light emission layer and a charge transport layer disposed on the light emission layer. One or more nanostructures may be formed by removing a portion of the charge transport layer and/or the light emission layer and depositing a plasmonic metamaterial on a remaining portion of the charge transport layer and/or the light emission layer. The one or more nanostructures may include the plasmonic metamaterial deposited inside the recesses formed by the remaining portion of the charge transport layer and/or the light emission layer, with an additional portion of the charge transport layer disposed on top. A material composition, shape, dimension, placement, and/or distribution of the one or more nanostructures may be configured to maximize the quantum efficiency of the light emitting diode, especially at a microscale of less than 100 microns.

Abstract: A photographing apparatus and an inspection device are provided. The photographing apparatus comprises a camera, a light supplementing structure, and a closed housing; the camera is provided with a lens, and positioned in and connected to the housing; the housing is provided with at least one photographing portion configured to be attached to an object to be photographed, and a space is formed between the lens and the photographing portion; the light supplementing structure is positioned in and connected to the housing, the light supplementing structure is configured to emit light to said object through the space and the photographing portion, and the lens is configured to capture an image of said object via the photographing portion. The inspection device comprises a rack and the photographing apparatus, and the housing is connected to the rack.

Abstract: Disclosed is an atomic force microscopy system includes a laser source configured to generate an optical probe beam containing light of different spectral light components at different optical wavelengths, a dispersive optical device positioned to receive the optical probe beam and configured to disperse the optical probe beam into different dispersed light beams that are at different optical wavelengths and are spatially separated from one another, a cantilever array including a plurality of cantilevers structured to detect a sample and configured to deflect the different dispersed light beams by moving in position based on an interaction with the sample to produce multiple deflected output beams at different output optical wavelengths from the cantilevers, and a plurality of photodetectors to receive the multiple deflected output beams of different wavelengths from the cantilevers, respectively.

Abstract: Disclosed is an atomic force microscopy system includes a laser source configured to generate an optical probe beam containing light of different spectral light components at different optical wavelengths, a dispersive optical device positioned to receive the optical probe beam and configured to disperse the optical probe beam into different dispersed light beams that are at different optical wavelengths and are spatially separated from one another, a cantilever array including a plurality of cantilevers structured to detect a sample and configured to deflect the different dispersed light beams by moving in position based on an interaction with the sample to produce multiple deflected output beams at different output optical wavelengths from the cantilevers, and a plurality of photodetectors to receive the multiple deflected output beams of different wavelengths from the cantilevers, respectively.

Abstract: In some example embodiments, there may be provided a metasurface for edge detection. The metasurface may include a nano or subwavelengh surface structure configured to provide an output having optical separation to enable detection of at least one edge of an object being illuminated, wherein the optical separation is based on a phase profile configured on the nano or subwavelengh surface structure of the metasurface.

Abstract: A metallic quantum well may be formed by interposing a layer of metallic well material two layers of barrier material. Two or more metallic quantum wells may be combined to form a coupled metallic quantum well. The absorption spectrum and the emission spectrum of the coupled metallic quantum well may be tuned by at least adjusting the dimensions of the individual metallic quantum wells and/or the materials forming the metallic quantum wells. The metallic quantum well and/or the coupled metallic quantum well may exhibit sufficient nonlinearity even at a miniaturized scale. As such, the metallic quantum well and/or coupled metallic quantum well may be used for a variety of on-chip applications including, for example, as part of an on-chip pulse limiter, an on-chip super-continuum generator, and/or the like.

Abstract: A light emitting diode may include a light emission layer and a charge transport layer disposed on the light emission layer. A grating including a plurality of nanoholes may be formed by removing a portion of the charge transport layer and/or the light emission layer and depositing a plasmonic metamaterial on a remaining portion of the charge transport layer and/or the light emission layer. The nanoholes may include the plasmonic metamaterial deposited inside the recesses formed by the remaining portion of the charge transport layer and/or the light emission layer, with an additional portion of the charge transport layer disposed on top. A pitch, diameter, and/or depth of the nanoholes may be configured to maximize the quantum efficiency of the light emitting diode, especially at a microscale of less than 100 microns.

Abstract: A spectrometry system may include an etalon array having a first etalon and a second etalon. The first etalon may be configured to process light to at least generate a first transmission pattern. The first transmission pattern may have at least a first transmission peak corresponding to a first wavelength in an original spectrum of the light. The second etalon may be configured to process the light to at least generate a second transmission pattern. The second transmission pattern may have at least a second transmission peak corresponding to a second wavelength in the original spectrum of the light. The first etalon may have a different thickness than the second etalon in order for the first transmission pattern to have at least one transmission peak that is at a different wavelength than the second transmission pattern. The first transmission pattern and the second transmission pattern may enable a reconstruction the original spectrum of the light.

Abstract: An apparatus for compressive sensing may include a filter array, a detector, and a reconstruction engine. The filter array may be configured to generate a first illumination pattern in response to a first wavelength of light and a second illumination pattern in response to a second wavelength of light. The first illumination pattern and the second illumination pattern may be projected onto an object. The detector may be configured to determine a first intensity of a first light emitted by the object in response to the first illumination pattern and a second intensity of a second light emitted by the object in response to the second illumination pattern. The reconstruction engine may be configured to generate an image of the object based at least on the first intensity, the first illumination pattern, the second intensity, and the second illumination pattern.

Abstract: The document discloses transferrable hyperbolic metamaterial particles (THMMP) that display broadband, selective, omnidirectional absorption and can be transferred to secondary substrates, allowing enhanced flexibility and selective transmission. A device having metamaterial nanostructures includes a substrate and metamaterial nanostructures engaged to the substrate to form an optical layer to interact with light incident to the optical layer to exhibit optical reflection or absorption or transmission that is substantially uniform over a spectral range of different optical wavelengths associated with materials and structural features of the metamaterial nanostructures, each metamaterial nanostructure including different material layers that are interleaved to form a multi-layer nanostructure.

Abstract: Techniques, systems, devices and materials are disclosed for spectrally selective coatings for optical surfaces having high solar absorptivity, low infrared emissivity, and strong durability at elevated temperatures. In one aspect, a spectrally selective coating includes a substrate formed of a light absorbing material, and a composite material formed over the substrate and including nanoparticles dispersed in a dielectric material, in which the composite material forms a coating capable of absorbing solar energy in a selected spectrum and reflecting the solar energy in another selected spectrum.

Abstract: In one aspect, there is provided an apparatus including a light emitting diode. The apparatus may include a plurality of layers including a substrate layer, a buffer layer disposed on the substrate layer, a charge transport layer, a light emission layer, another charge transport layer, and/or a metamaterial layer. The other charge transport layer may have at least one channel etched into the other charge transport layer leaving a residual thickness of the other charge transport layer between a bottom of the etched channel and the light emission layer. A metamaterial layer may be contained in the at least one channel that is proximate to the residual thickness of the charge transport layer. The metamaterial may include a structure including at least one of a dielectric or a metal. The metamaterial may cause the light emitting diode to operate at higher frequencies and with higher efficiency.

Abstract: A metallic quantum well may be formed by interposing a layer of metallic well material two layers of barrier material. Two or more metallic quantum wells may be combined to form a coupled metallic quantum well. The absorption spectrum and the emission spectrum of the coupled metallic quantum well may be tuned by at least adjusting the dimensions of the individual metallic quantum wells and/or the materials forming the metallic quantum wells. The metallic quantum well and/or the coupled metallic quantum well may exhibit sufficient nonlinearity even at a miniaturized scale. As such, the metallic quantum well and/or coupled metallic quantum well may be used for a variety of on-chip applications including, for example, as part of an on-chip pulse limiter, an on-chip super-continuum generator, and/or the like.

Abstract: A spectrometry system may include an etalon array having a first etalon and a second etalon. The first etalon may be configured to process light to at least generate a first transmission pattern. The first transmission pattern may have at least a first transmission peak corresponding to a first wavelength in an original spectrum of the light. The second etalon may be configured to process the light to at least generate a second transmission pattern. The second transmission pattern may have at least a second transmission peak corresponding to a second wavelength in the original spectrum of the light. The first etalon may have a different thickness than the second etalon in order for the first transmission pattern to have at least one transmission peak that is at a different wavelength than the second transmission pattern. The first transmission pattern and the second transmission pattern may enable a reconstruction the original spectrum of the light.

Abstract: In one aspect, there is provided an apparatus including a light emitting diode. The apparatus may include a plurality of layers including a substrate layer, a buffer layer disposed on the substrate layer, a charge transport layer, a light emission layer, another charge transport layer, and/or a metamaterial layer. The other charge transport layer may have at least one channel etched into the other charge transport layer leaving a residual thickness of the other charge transport layer between a bottom of the etched channel and the light emission layer. A metamaterial layer may be contained in the at least one channel that is proximate to the residual thickness of the charge transport layer. The metamaterial may include a structure including at least one of a dielectric or a metal. The metamaterial may cause the light emitting diode to operate at higher frequencies and with higher efficiency.