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Versatile spin-polarized electron source

United States Patent

September 22, 2015
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
One or more embodiments relate generally to the field of photoelectron spin and, more specifically, to a method and system for creating a controllable spin-polarized electron source. One preferred embodiment of the invention generally comprises: method for creating a controllable spin-polarized electron source comprising the following steps: providing one or more materials, the one or more materials having at least one surface and a material layer adjacent to said surface, wherein said surface comprises highly spin-polarized surface electrons, wherein the direction and spin of the surface electrons are locked together; providing at least one incident light capable of stimulating photoemission of said surface electrons; wherein the photon polarization of said incident light is tunable; and inducing photoemission of the surface electron states.
Jozwiak; Chris (Oakland, CA), Park; Cheol-Hwan (Seoul, KR), Gotlieb; Kenneth (Berkeley, CA), Louie; Steven G (Berkeley, CA), Hussain; Zahid (Orinda, CA), Lanzara; Alessandra (Piedmont, CA)
14/ 185,651
February 20, 2014
GOVERNMENT RIGHTS The United States Government has rights in this invention pursuant to DOE Contract No. DE-AC02-05CH11231 between the U.S. Department of Energy and the University of California, as operator of Lawrence Berkeley National Laboratory.