Leland Stanford Junior University

Northrop Grumman Systems Corporation

Mark Lawrence

Jennifer Anne Dionne

Vladan Jankovic

Brian Keith Baum

Hadiseh Alaeian

David Russell Barton, Iii

Jefferson Dixon

Jack Hu

Michelle Solomon

Lisa V Poulikakos

A device for detecting optical chirality includes a metasurface composed of a biperiodic array of nanodisks in the form of a checkerboard array [], where the nanodisks have diameters d±Δ/2 such that adjacent nanodisks [] have diameters that differ by an offset Δ. The nanodisks are composed of a dielectric material that is transparent and has a refractive index greater than 2 at a predetermined operational ultraviolet wavelength. The nanodisks have a width-to-height aspect ratio d/h tuned to produce spectral overlap of electric dipole and magnetic dipole modes of incident circularly polarized ultraviolet light.

Metasurface device for detecting optical chirality

A metasurface optical device composed of three stacked dielectric layers which form an anti-reflective structure for wavelengths in a predetermined operational wavelength range within the visible spectrum. The anti-reflective structure contains a rectangular lattice of rhombohedral perturbations that produce guided-mode resonances within the predetermined operational wavelength range. The guided-mode-resonant dielectric metasurface device is capable of detecting by colorimetric readout the presence and orientation of a linearly birefringent anisotropic medium, such as a fibrous tissue, positioned above the stacked dielectric layers.

Metasurfaces for optical detection of tissue and fibrous material anisotropy

High quality factor electromagnetic metasurfaces are provided. The metasurface is configured to have in plane guided-mode resonances (e.g., corresponding to waveguide modes or the like). Coupling features are included in the metasurface that are configured to couple free-space radiation to the guided mode resonances. The resulting structures have a high-Q response to free-space radiation and can be used for various applications, such as beam splitting, beam steering, and beam focusing or defocusing.

High quality factor non-uniform metasurfaces

A device includes a light adjustment apparatus having at least one material having a dielectric permittivity, the at least one material to affect the flow of light, wherein the light adjustment apparatus includes a tunable material to enable adjustment of the dielectric permittivity of the at least one material.

Dynamically tunable materials for parity-time symmetric electro-optical devices

A device includes a light adjustment apparatus having a first material and a second material. The first material includes a first real dielectric permittivity and a positive imaginary dielectric permittivity. The second material includes a second real dielectric permittivity and a negative imaginary dielectric permittivity. The first and second materials affect the flow of light. The light adjustment apparatus includes a tunable material to enable adjustment of the dielectric permittivity of the respective materials.

Growing community of inventors

San Francisco, CA, United States of America

Mark Lawrence