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:
Devices based on metamaterial structures to guide and manipulate light, other electromagnetic radiation and acoustic waves. For example, a lens can include a metamaterial structure comprising nano structures of metallic and dielectric materials; and a plasmonic waveguide coupler formed over the metamaterial structure for coupling electromagnetic radiation to or from metamaterial structure. The metamaterial structure has an anisotropic structure and the plasmonic waveguide coupler is structured to include metal and non-metal parts to support surface plasmon polaritons and to cause different phase delays at different locations of ' an interface with the metamaterial structure in a way that the metamaterial structure and the plasmonic waveguide coupler effect a lens for performing a Fourier transform of the electromagnetic radiation coupled between the metamaterial structure and the plasmonic waveguide coupler.
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:
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:
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 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:
A high effective refractive index structure may include one or more high effective refractive index materials disposed on a substrate. The high effective refractive index structure configured to respond to a light received at the high effective refractive index structure by at least generating one or more sub-diffraction limit illumination patterns for illuminating a specimen while one or more frames are captured of the illuminated specimen. The one or more sub-diffraction limit illumination patterns may include one or more speckle patterns. The one or more high effective refractive index materials may exhibit an effective refractive index equal to or greater than 3. Examples of high effective refractive index materials include hyperbolic metamaterial (HMM) multilayers, nanowire based hyperbolic metamaterials, and organic hyperbolic materials (OHM).
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:
Methods, systems, and devices are disclosed for fabricating and implementing optically absorbing coatings. In one aspect, an optically selective coating includes a substrate formed of a solar energy absorbing material, and a nanostructure material formed over the substrate as a coating capable of absorbing solar energy in a selected spectrum and reflecting the solar energy in another selected spectrum. A concentrating solar power (CSP) system includes heat transfer fluids (HTFs); thermal energy storage system (TES); and solar receivers in communication with HTFs and including a light absorbing coating layer based on cobalt oxide nanoparticles.
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.