USA as Represented by Secretary of the Navy

Washington University

Matthew Lumb

Jerry R Meyer

Igor Vurgaftman

Robert J Walters

Edward H Aifer

Michael K Yakes

María González

Christopher Bailey

Chaffra Affouda

An efficient monolithic optocoupler device that includes a photovoltaic region, an electrically isolating region, and a light emitting region deposited on a substrate in a single stack. The electrically isolating region (e.g., one or more diodes or resistive semiconductor layers) allows photons to pass from the light emitting region to the photovoltaic region while blocking electrical current between those regions. In some embodiments, the optocoupler device includes a reflector on a side of the light emitting region (opposite the photovoltaic region) that reflects photons emitted by the light emitting region back toward the photovoltaic region. The optocoupler device may also include a reflector on a side of the photovoltaic region (opposite the light emitting region) that reflects photons emitted by the light emitting region back toward the photovoltaic region. In other embodiments, the optocoupler device includes two photovoltaic regions sandwiching the light emitting region.

Efficient monolithic optocoupler device

A linear regulator operates in the manner of a linear voltage regulator, but with the functionality of a switching converter. This concept enables DC voltage up-conversion with no switching, more efficient step down of large voltage steps, and requires no expensive and bulky additional components. An optocoupler device transfers power between light emitting and photovoltaic devices.

Linear voltage regulator circuit incorporating light emitting and photovoltaic devices

A computationally efficient method for building a superlattice structure that improves an optoelectronic device performance characteristic that depends on fundamental superlattice material properties such as absorption coefficient &#x3b1;(&#x3c9;), radiative efficiency Rand/or electron density n.

Computationally efficient method for building quantum heterostructures

A strain-balanced quantum well tunnel junction (SB-QWTJ) device. QW structures are formed from alternating quantum well and barrier layers situated between nand players in a tunnel junction formed on a substrate. The quantum well layers exhibit a compressive strain with respect to the substrate, while the barrier layers exhibit a tensile strain. The composition and layer thicknesses of the quantum well and barrier layers are configured so that the compressive and tensile strains in the structure are balanced.

Growing community of inventors

Alexandria, VA, United States of America

Matthew Lumb