California Institute of Technology

Nanoclear Technologies, Inc.

Northrop Grumman Systems Corporation

Ryan Morrow Briggs

Harold Frank Greer

Harry A Atwater

Tony Lee

Clifford F Frez

Scott S Harried

Siamak Forouhar

Imogen Pryce

Nathan S Lewis

Shannon W Boettcher

Rehan Rashid Kapadia

Vladan Jankovic

Michael D Kelzenberg

Alireza Marandi

Linda Y Del Castillo

Luke Sweatlock

Mina Rais-zadeh

Mahmood Bagheri

Luis Ledezma

Koray Aydin

Yousif Kelaita

Jan A Petykiewicz

Yinglun Xu

Kenneth Diest

James Ma

Mathieu Fradet

Carl E Borgentun

A composition sensor for measuring composition of fluid mixtures is presented. The composition sensor includes a plurality of high-brightness emission sources having respective spectrally narrow wavelength emission bands in the infrared region. The wavelength emission bands overlap absorption wavelength bands of the composition. The wavelength emission bands are wavelength multiplexed and time multiplexed prior to emission through a fluid mixture. A single optical detector senses the emitted light. The composition sensor includes arms that can rotate to measure composition at different angular position of a pipe in a lateral section of an oil well. Rotation of the arms is provided by rotation of an element of a mobile vessel to which the arm is rigidly coupled. The rotation of the arms is provided by a rotation of a nose of the mobile vessel that rotates independently from a main body of the mobile vessel.

Infrared absorption-based composition sensor for fluid mixtures

Single-mode distributed-feedback (DFB) lasers including single mode DFB waveguides with tapered grating structures are provided herein. Tapered grating structures provide for single mode DFB waveguides with predictable single mode operation. Uniform grating structures may provide for single mode operation, however DFB waveguides implementing uniform grating structures may operate at one of two single modes. Advantageously, DFB waveguides with tapered gratings operate with a spectrally narrow single mode at the same predictable single mode for all DFB waveguides with substantially identical specifications. Such predictability may lead to increased yield during manufacture of DFB waveguides with tapered gratings.

Tapered-grating single mode lasers and method of manufacturing

An optical parametric oscillator (OPO) including a thin film waveguide including a material having a second order nonlinear susceptibility generating an electromagnetic wave in response to pump electromagnetic wave inputted into the thin film waveguide. The electromagnetic wave has a first wavelength or first set of wavelengths longer than a second wavelength or second set of wavelengths of the pump electromagnetic wave. The thin film waveguide has a thickness on the order of the first wavelength or the first set of wavelengths in the thin film waveguide so as to guide the output electromagnetic wave along the thin film waveguide.

Thin-film optical parametric oscillators

The physical and chemical properties of surfaces can be controlled by bonding nanoparticles, microspheres, or nanotextures to the surface via inorganic precursors. Surfaces can acquire a variety of desirable properties such as antireflection, antifogging, antifrosting, UV blocking, and IR absorption, while maintaining transparency to visible light. Micro or nanomaterials can also be used as etching masks to texture a surface and control its physical and chemical properties via its micro or nanotexture.

Property control of multifunctional surfaces

The physical and chemical properties of surfaces can be controlled by bonding nanoparticles, microspheres, or nanotextures to the surface via inorganic precursors. Surfaces can acquire a variety of desirable properties such as antireflection or reflection, antifogging, antifrosting, UV blocking, and IR absorption, while maintaining transparency to visible light. Micro or nanomaterials can also be used as etching masks to texture a surface and control its physical and chemical properties via its micro or nanotexture.

Control of surface properties by deposition of particle monolayers

Methods and systems to boost efficiency of solar cells

Quantum cascade (QC) lasers and methods of fabricating such QC lasers are provided. The QC lasers incorporate a DFB grating without requiring the use of relying on epitaxial regrowth processes. The DFB gratings are formed as sidewall gratings along the lateral length of the QC active region, or the DFB gratings are formed atop the lateral length of the QC active region, and wherein the top DFB grating is planarized with a polymeric material.

Index-coupled distributed-feedback semiconductor quantum cascade lasers fabricated without epitaxial regrowth

Single-mode, distributed feedback interband cascade lasers (ICLs) using distributed-feedback gratings (e.g., lateral Bragg gratings) and methods of fabricating such ICLs are provided. The ICLs incorporate distributed-feedback gratings that are formed above the laser active region and adjacent the ridge waveguide (RWG) of the ICL. The ICLs may incorporate a double-ridge system comprising an optical confinement structure (e.g., a RWG) disposed above the laser active region that comprises the first ridge of the double ridge system, a DFB grating (e.g., lateral Bragg grating) disposed above the laser active region and adjacent the optical confinement structure, and an electric confinement structure that passes at least partially through the laser active region and that defines the boundary of the second ridge comprises and the termination of the DFB grating.

Single-mode, distributed feedback interband cascade lasers

A tunable metamaterial structure, comprises a flexible substrate capable of being strained, a metamaterial pattern on a surface of the flexible substrate, and a metal layer on the metamaterial pattern. The flexible substrate of the tunable metamaterial structure is a strained and relaxed substrate which has been strained to a degree sufficient to register a resonant response upon relaxation that is shifted relative to the resonant response of the flexible substrate prior to being strained. The application of strain to the flexible substrate of the metamaterial structure enables tuning of the resonant frequency.

Tunable compliant optical metamaterial structures

A structure comprising an array of semiconductor structures, an infill material between the semiconductor materials, and one or more light-trapping elements is described. Photoconverters and photoelectrochemical devices based on such structure also described.

Semiconductor wire array structures, and solar cells and photodetectors based on such structures

Systems and methods are provided for modulating light of a wavelength of interest. The modulator assembly includes a plasmonic layer that supports surface plasmon polaritons at the wavelength of interest and a layer of solid-state phase change material having a first phase in which it is substantially transparent to light of the wavelength of interest and a second phase in which it is substantially opaque to light of the wavelength of interest. A control mechanism is configured to alter the phase of the solid-state phase change material between the first phase and the second phase. Each of the plasmonic layer and the layer of solid-state phase change material are configured as to provide a plasmonic mode of transmission for light of the wavelength of interest.

Plasmonic modulator incorporating a solid-state phase change material

Growing community of inventors

Pasadena, CA, United States of America

Ryan Morrow Briggs