Abstract:
Provided is a polarization spectral filter, including: a first reflector and a second reflector disposed to face each other in a first direction; and a grating layer disposed between the first reflector and the second reflector. The grating layer includes a plurality of first grating elements and a plurality of second grating elements, the plurality of first grating elements and the plurality of second grating elements being alternately arranged in a second direction perpendicular to the first direction. The plurality of first grating elements include a first dielectric material having a first refractive index. The plurality of second grating elements include a second dielectric material having a second refractive index different from the first refractive index.
Abstract:
Provided is a polarization spectral filter, including: a first reflector and a second reflector disposed to face each other in a first direction; and a grating layer disposed between the first reflector and the second reflector. The grating layer includes a plurality of first grating elements and a plurality of second grating elements, the plurality of first grating elements and the plurality of second grating elements being alternately arranged in a second direction perpendicular to the first direction. The plurality of first grating elements include a first dielectric material having a first refractive index. The plurality of second grating elements include a second dielectric material having a second refractive index different from the first refractive index.
Abstract:
Provided are an optical filter and a spectrometer including the optical filter. The optical filter includes at least one first filter element having a first center wavelength of a first wavelength band, and at least one second filter element arranged on a same plane as the at least one first filter element, the at least one second filter element having a second center wavelength of a second wavelength band. The at least one first filter element includes a first bandpass filter including a plurality of first Bragg reflective layers and at least one first cavity provided between the plurality of first Bragg reflective layers, and a first multi-layer provided on the first bandpass filter, the first multi-layer having a center wavelength different than the first center wavelength of the first Bragg reflective layers in order to block light of a wavelength band other than the first wavelength band.
Abstract:
An optical signal processing apparatus acquires a plurality of image signals using an optical signal output from a light source toward a target, and determines a characteristic of a target by using the obtained plurality of image signals. The obtained image signals are obtained from a plurality of sensor arrays including a plurality of image sensors.
Abstract:
A quantum dot light emitting device includes a grating device which includes a grating region that has a particular grating interval, and a quantum dot layer located above the grating region. The device provides high-purity color light based on a selection of a wavelength band by the grating region in correspondence with a wavelength band of light emitted from the quantum dot layer.
Abstract:
Provided is a hyperspectral image sensor including a solid-state imaging device including a plurality of pixels disposed two-dimensionally, and configured to sense light, and a dispersion optical device disposed to face the solid-state imaging device at an interval, and configured to cause chromatic dispersion of incident light such that the incident light is separated based on wavelengths of the incident light and is incident on different positions, respectively, on a light sensing surface of the solid-state imaging device.
Abstract:
A semiconductor laser resonator configured to generate a laser beam includes a gain medium layer including a semiconductor material and comprising at least one protrusion formed by at least one trench to protrude in an upper portion of the gain medium layer. In the semiconductor laser resonator, the at least one protrusion is configured to confine the laser beam as a standing wave in the at least one protrusion.
Abstract:
Provided is a spectral filter including a first unit filter (110) having a first center wavelength in a first wavelength range, and a second unit filter (120) having a second center wavelength in a second wavelength range, wherein the first unit filter includes two first metal reflective layers (131, 132) provided spaced apart from each other and including a first metal, and a first cavity (141, 142, 143) provided between the two first metal reflective layers, and wherein the second unit filter includes two second metal reflective layers (151, 152) provided spaced apart from each other and including a second metal different from the first metal, and a second cavity (161, 162, 163) provided between the two second metal reflective layers. The first metal material has a plasma frequency in the UV and the second metal material has its plasma frequency in the visible.
Abstract:
Provided is a spectral filter including a first unit filter (110) having a first center wavelength in a first wavelength range, and a second unit filter (120) having a second center wavelength in a second wavelength range, wherein the first unit filter includes two first metal reflective layers (131, 132) provided spaced apart from each other and including a first metal, and a first cavity (141, 142, 143) provided between the two first metal reflective layers, and wherein the second unit filter includes two second metal reflective layers (151, 152) provided spaced apart from each other and including a second metal different from the first metal, and a second cavity (161, 162, 163) provided between the two second metal reflective layers. The first metal material has a plasma frequency in the UV and the second metal material has its plasma frequency in the visible.
Abstract:
Provided is a polarization spectral filter, including: a first reflector and a second reflector disposed to face each other in a first direction; and a grating layer disposed between the first reflector and the second reflector. The grating layer includes a plurality of first grating elements and a plurality of second grating elements, the plurality of first grating elements and the plurality of second grating elements being alternately arranged in a second direction perpendicular to the first direction. The plurality of first grating elements include a first dielectric material having a first refractive index. The plurality of second grating elements include a second dielectric material having a second refractive index different from the first refractive index.