Abstract:
A light modulator may include: a light modulating unit formed as a pixel-array type by using a PIN diode including multiple quantum wells including a Group-III nitride semiconductor material, and configured to modulate light by electroabsorption; and/or a control unit including a transistor configured to control voltage applied to the PIN diode of the light modulating unit. The PIN diode and the transistor may be arrayed in an active matrix form.
Abstract:
A thermal imaging pixel, including a variable resistor array; and a pixel readout circuit configured to read electrical signals corresponding to a composite resistance of the variable resistor array, wherein the variable resistor array includes a plurality of variable resistor subarrays electrically connected in series, wherein each variable resistor subarray of the plurality of variable resistor subarrays includes a plurality of variable resistor cells electrically connected in parallel, and wherein each variable resistor cell of the plurality of variable resistor cells has a resistance which changes according to temperature.
Abstract:
Provided is a long-wave infrared (LWIR) sensor including a substrate, a magnetic resistance device on the substrate, and an LWIR absorption layer on the magnetic resistance device, wherein a resistance of the magnetic resistance device changes based on temperature, and wherein the LWIR absorption layer is configured to absorb LWIR rays and generate heat.
Abstract:
A window assembly includes a transparent window layer and a first coded mask layer provided on a first surface of the window layer, the first coded mask layer having a first shape configured to change a first property of light passing through the window assembly. The first coded mask layer may include a meta-surface including a phase modulation meta-pattern. The meta-surface may further include an amplitude modulation meta-pattern. A second coded mask layer having a second shape configured to change a second property of the light passing through the window assembly may further be provided on a second surface of the window layer.
Abstract:
A spatial light modulator and a beam steering apparatus including the same are provided. The spatial light modulator includes a first reflective layer; a cavity layer provided on the first reflective layer; and a reflective layer including a plurality of unit lattice structures that are provided on the cavity layer are and spaced apart from each other. Each of the plurality of unit lattice structures has a polycrystalline structure, and at least one grain of the polycrystalline structure has a column shape and a height equal to a height of the plurality of unit lattice structures.
Abstract:
Provided is a light modulator including a substrate, and a resonator configured to modulate a phase of incident light by modulating a refractive index based on an external stimulus, the resonator comprising a first reflective structure provided on the substrate, a cavity layer provided on the first reflective structure, and a second reflective structure provided on the cavity layer, wherein at least one of the first reflective structure or the second reflective structure comprises first material layers, second material layers that are alternately stacked with the first material layers, and a third material layer, and wherein each of the first material layers has a first refractive index, each of the second material layers has a second refractive index that is different from the first refractive index, and the third material layer has a third refractive index that is different from the first refractive index
Abstract:
A beam steering apparatus includes a substrate; at least one light source provided on the substrate; a first waveguide configured to transmit a first light beam radiated from the at least one light source; at least one beam splitter configured to split the first light beam transmitted by the first waveguide to obtain a second light beam; a second waveguide configured to receive the second light beam; and a quantum dot optical amplifier provided on the second waveguide and comprising a barrier layer, a quantum dot layer, and a wetting layer, the quantum dot optical amplifier being configured to modulate a phase of the second light beam, and to amplify an intensity of the second light beam.
Abstract:
Provided is a beam scanning apparatus including a plurality of antenna resonators disposed two-dimensionally in a row direction and a column direction, a plurality of row voltage lines that are configured to provide a plurality of driving voltages in a row direction, respectively, a plurality of column voltage lines that are configured to provide a plurality of driving voltages in a column direction, respectively, and a driving voltage conversion circuit configured to control a driving voltage applied to each of the plurality of antenna resonators based on a driving voltage in the row direction that is provided from each of the plurality of row voltage lines and a driving voltage in the column direction that is provided from each of the plurality of column voltage lines.
Abstract:
A laser beam steering device and a system including the laser beam steering device are provided. The laser beam steering device includes a refractive index change layer having a refractive index that changes based on an electrical signal; at least one antenna pattern disposed above the refractive index change layer; a wavelength selection layer disposed under the refractive index change layer and configured to correspond to a wavelength of a laser beam incident onto the laser beam steering device; and a driver configured to apply the electrical signal to the refractive index change layer.
Abstract:
Nano antenna structures and methods of manufacturing the same are provided. A nano antenna structure includes a reflective layer, a transparent conductive layer disposed on the reflective layer, an insulating layer disposed on the transparent conductive layer, a nano antenna material layer disposed on the insulating layer, and an adhesion layer disposed between the insulating layer and the nano antenna material layer.