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1. (WO2018017018) TERAHERTZ RADIATION EMITTERS

Pub. No.:    WO/2018/017018    International Application No.:    PCT/SG2017/050360
Publication Date: Fri Jan 26 00:59:59 CET 2018 International Filing Date: Thu Jul 20 01:59:59 CEST 2017
IPC: H01L 31/102
G01N 21/3581
Applicants: NATIONAL UNIVERSITY OF SINGAPORE
Inventors: WU, Yang
YANG, Hyunsoo
Title: TERAHERTZ RADIATION EMITTERS
Abstract:
A method of generating electromagnetic radiation in the terahertz frequency range is disclosed herein. In one embodiment, the method comprises the steps of providing a bi-layer heterojunction comprising a ferromagnetic metal layer adjacent a non-magnetic metal layer, wherein the non-magnetic layer comprises one of platinum or tungsten and applying a femtosecond laser beam to the heterojunction. The terahertz electromagnetic radiation may be generated by an inverse spin orbit interaction comprising an inverse spin Hall effect and/or inverse spin orbital torques. A terahertz emitter device and an apparatus for generating electromagnetic radiation in the terahertz frequency range are also described.