California Institute of Technology

Hyounghan Kwon

Andrei Faraon

Ehsan Arbabi

Phillippe Mj Pearson

Yiran Gu

Bilgehan Baspinar

Tianzhe Zheng

Tunable optical structures operating based on slot resonances can be produced with periodic structures where each period includes at least two parallel nanobars with a slot therebetween. The slots include periodic notches served to generate resonances, the wavelength and the quality-factor of which can be controlled by applying bias voltages to nanobars thus generating mechanical movement of such nanobars. Phase modulators with close to unity reflection and beam steering devices can also be made based on these concepts.

Tunable optical metasurfaces based on slot mode resonances

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.

Metasurface imager for quantitative phase gradient detection

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Pasadena, CA, United States of America

Hyounghan Kwon