Lawrence Livermore National Security, LLC

Noah Patrick Allen

Lars F Voss

Sara Elizabeth Harrison

Clint Frye

Vincenzo Lordi

Joseph Devin Schneider

Alexander Peter Povilus

Joel Varley

Caitlin Anne Chapin

Kyoung Eun Kweon

John Berns Lancaster

Laura Leos

Devices, methods and techniques related to photoconductive switches using diamond are disclosed. In one example aspect, a photoconductive apparatus includes a diamond layer positioned to receive a light. The diamond layer is doped with nitrogen. The apparatus also includes a first electrode coupled to the diamond layer to provide a first electrical contact for the diamond layer, and a second electrode coupled to the diamond layer to provide a second electrical contact for the diamond layer and configured to reflect the light back to the diamond layer. The first electrode and the second electrode are configured to establish an electric field across the diamond layer in response to receiving the light.

Photoconductive switch with diamond

An apparatus includes a heterostructure including a substrate of Group-III-nitride material, a source layer including a dopant positioned on a surface of the substrate, and a conductive cap layer positioned on the source layer. A method of electric field-enhanced impurity diffusion includes obtaining a heterostructure including a substrate of Group-III-nitride semiconductor material, a source layer including a dopant positioned directly on the substrate, and a conductive cap layer positioned above the source layer, and applying a thermal annealing treatment to the heterostructure. An electric field gradient is established within the source layer and the cap layer for causing diffusion of an element from the substrate to the cap layer, and for causing diffusion of the dopant from the source layer to a former location of the element in the substrate thereby changing a conductivity and/or magnetic characteristic of the substrate.

Field assisted interfacial diffusion doping through heterostructure design

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Oakland, CA, United States of America

Noah Patrick Allen