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US 2020/0348500 A1Published application
Metasurface imager for quantitative phase gradient detection
AssigneeCalifornia Institute of Technology
InventorsHyounghan KWON, Ehsan ARBABI, Andrei FARAON
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Abstract
Quantitative phase gradient microscopes (QPGM) using metasurface layers including birefringent lenses are disclosed. The birefringent lenses are manufactured by patterning nanoposts on two different transparent substrates or on opposite sides of the same transparent substrate. Methods to generate phase gradient images (PGI) of objects using the described devices are also disclosed.
Claims20
A miniaturized quantitative phase gradient microscope (QPGM) comprising:
- a polarization sensitive and beam splitting first metasurface layer including a birefringent first metasurface lens;
- a polarization sensitive second metasurface layer including birefringent second metasurface lenses;
- wherein:
- i) the first metasurface layer is configured to:
- receive light from an object,
- split the light into plural split light beams travelling in separate directions towards corresponding second birefringent metasurface lenses, each split light beam including a transverse electric polarization and a transverse magnetic polarization, and
- ii) the second metasurface layer is configured to:
- receive the split light beams at the corresponding second birefringent metasurface lenses, and
- form separate phase-shifted differential interference contrast (DIC) images.
6 more elements
A metasurface-based method of generating a quantitative phase gradient image of an object comprising:
- by a first set of one or more metasurfaces, receiving a light beam from an object;
- by the first set of one or more metasurfaces, spatially splitting the light beam into plural separate split light beams, each separate split light beam including a transverse electric polarization and a transverse magnetic polarization;
- by a second set of plural metasurfaces, forming corresponding phase-shifted differential interference contrast images through the plural separate split light beams, and
- generating a phase gradient image from the differential interference contrast images.
1 more element
Dependencies are inferred from the claim text.