University of Southern California

Wei Wu

Yong Qin Chen

Huachao Mao

Hao Yang

Tse-Hsien Ou

Yunxiang Wang

Yuanrui Li

Yifei Wang

He Liu

Yuhan Yao

A semiconductor-based sensor to detect light angle of incidence includes a semiconductor light sensor element and a patterned spatially inhomogeneous dielectric layer disposed over the semiconductor light sensor element. Characteristically, spatial inhomogeneity of the patterned spatially inhomogeneous dielectric layer is optimized to provide a maximized electric field in the semiconductor light sensor element such that the semiconductor-based sensor is operable to detect one or more incident angles of light at a predefined wavelength or wavelengths of light.

Inverse design of angle sensitive metasurfaces for light field imaging

A semiconductor-based sensor with enhanced light absorption, and in particular, enhanced infrared light absorption includes a semiconductor light sensor element and a patterned spatially inhomogeneous dielectric layer disposed over the semiconductor light sensor element. Characteristically, spatial inhomogeneity of the patterned spatially inhomogeneous dielectric layer is optimized to provide a maximized electric field in the semiconductor light sensor element such light absorption is enhanced.

Metasurfaces for high-efficient IR photodetectors

Methods, systems, and apparatus for multi-scale stereolithography. The apparatus includes a light source for providing a laser beam having a first shape and a first size. The apparatus includes a dynamic aperture having multiple apertures that are of the same or different sizes or shapes. The dynamic aperture is configured to receive the laser beam and modify at least one of the shape or the size of the laser beam. The apparatus includes a platform for holding an object to be printed. The apparatus includes a processor connected to at least one of the light source, the dynamic aperture or the platform. The processor is configured to move the platform to direct the laser beam or direct the laser beam to cure resin onto the object to be printed using a first aperture of the multiple apertures to form the object.

3D printing with variable voxel sizes

A three-dimensional printing approach based on stereolithography with variable printing resolutions to solve the trade-off between throughput and resolution. In this technology, the variable fabrication resolutions are achieved by switching light wavelength. The apparatus includes an optical filter based on high-contrast gratings. In one embodiment, the minimum printing resolution of the accordingly constructed stereolithography apparatus is reduced to 37 &#x3bc;m.

3D printing with variable voxel sizes based on optical filter

In various embodiments, the invention teaches a method for water splitting with much higher efficiency than previous methods. By decreasing the distance between two electrodes to nanometer scale, even shorter than the electric field screening length, the external power required for water splitting is significantly reduced.

Nanoelectrodes for water splitting

A sub-pixel unit for a reflective display includes a color filter including a tunable high contrast grating. The tunable high contrast grating reflects light within a first range of wavelengths, and the sub-pixel unit can exist in a first state and a second state, the first state reflecting at least one of (i) light within a different range of wavelengths, and (ii) light of a different intensity level, than the second state.

Growing community of inventors

Los Angeles, CA, United States of America

Wei Wu