Back to results
US 12,007,276 B2Granted
Sensor for hyperspectral imaging based on a metasurface-integrated light detector array
AssigneePurdue Research Foundation
InventorsRohith Chandrasekar, Amr Shaltout, Vladimir Shalaev, Alexander Chubykin, Alexei Lagutchev
Life of this patent
Estimating the term…
Abstract
A spectroscopic microscope device, including at least one array of metasurfaces, and at least one CCD array integrated with the array of metasurfaces. The metasurfaces in the array are configured to separately direct LCP an RCP components of light incident on the metasurface to separate pixels in the CCD array.
Claims20
A spectroscopic device, comprising:
- a. a unitary surface having an array of transmissive metasurfaces configured to interact with an incident light reflected from a specimen, wherein each transmissive metasurface of the array of transmissive metasurfaces is positioned to interact with a different respective portion of the incident light;
- and
- b. a CCD array including a plurality of pixels integrated with the array of transmissive metasurfaces such that each transmissive metasurface is associated with a unique pair of pixels of the plurality of pixels, thereby forming a plurality of unique pairs of pixels,
- wherein each transmissive metasurface is configured to direct Left circularly polarized (LCP) components of the respective portion of the incident light on the transmissive metasurface to a first pixel of the unique pair of pixels and Right circularly polarized (RCP) components of the respective portion of the incident light on the transmissive metasurface to a second pixel of the unique pair of pixels,
- wherein the plurality of unique pairs of pixels collectively form a spectroscopically resolved image of the specimen.
2 more elements
A spectroscopic device, comprising:
- a. a unitary surface having an array of transmissive metasurfaces configured to interact with an incident light reflected from a specimen, wherein each transmissive metasurface of the array of transmissive metasurfaces includes a plurality of nanoantennas, wherein each nanoantenna is formed having a top metallic layer, a central dielectric layer, and a bottom metallic layer;
- b. a dielectric disposed adjacent to the array of transmissive metasurfaces;
- and
- c. a CCD array disposed adjacent to the dielectric, wherein the dielectric is positioned in between the array of transmissive metasurfaces and the CCD array, wherein the CCD array includes a first pixel and a second pixel spatially separate from the first pixel for each transmissive metasurface of the array of transmissive metasurfaces thereby forming a plurality of first pixels and a plurality of second pixels;
- wherein each transmissive metasurface is configured to direct Left circularly polarized (LCP) components of incident light on the transmissive metasurface to the respective first pixel and Right circularly polarized (RCP) components of incident light on the transmissive metasurface to the respective second pixel, wherein the plurality of first pixels and the plurality of second pixels capture an entire light spectrum reflected from the specimen to form a spectroscopically resolved image.
2 more elements
A spectroscopic sensor, comprising:
- a. a unitary surface having an array of transmissive metasurfaces configured to interact with an incident light reflected from a specimen, wherein each transmissive metasurface of the array of transmissive metasurfaces extends from 10 micrometers to 1 millimeter wide and is positioned to interact with a respective portion of the incident light;
- and
- b. a CCD array including a plurality of pixels, wherein each pixel of the plurality of pixels extends from 0.5 millimeters wide to 1 millimeter wide, wherein each transmissive metasurface of the array of transmissive metasurfaces is associated with a unique pair of pixels from the plurality of pixels, wherein each transmissive metasurface is configured to direct Left circularly polarized (LCP) components of the respective portion of the incident light to a first pixel of the unique pair of pixels and Right circularly polarized (RCP) components of the respective portion of the incident light to a second pixel of the unique pair of pixels, whereby a first spectral dataset is generated from all LCP components of the incident light and a second spectral dataset is generated from all RCP components of the incident light,
- wherein the first and second spectra datasets collectively form a spectroscopically resolved image.
1 more element
Dependencies are inferred from the claim text.