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Proceedings Paper

Electrically tunable surface plasmon for THz emission, detection, and other applications
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Paper Abstract

In this paper, we present a design for a widely tunable solid-state optically and electrically pumped THz laser based on the Smith-Purcell free-electron laser. In the free-electron laser, an energetic electron beam pumps a metallic grating to generate surface plasmons. Our solid-state optically pumped design consists of a thin layer of dielectic, such as SiNx, sandwiched between a corrugated structure and a thin metal or semiconductor layer. The lower layer is for current streaming, and replaces the electron beam in the original design. The upper layer consists of one micro-grating for coupling the electromagnetic field in, another for coupling out, and a nano-grating for coupling with the current in the lower layer for electromagnetic field generation. The surface plasmon waves generated from the upper layer by an external electromagnetic field, and the lower layer by the applied current, are coupled. Emission enhancement occurs when the plasmonic waves in both layers are resonantly coupled.

Paper Details

Date Published: 10 September 2010
PDF: 14 pages
Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 77571J (10 September 2010); doi: 10.1117/12.861428
Show Author Affiliations
Jed Khoury, Air Force Research Lab. (United States)
Bahareh Haji-Saeed, Air Force Research Lab. (United States)
Walter Buchwald, Air Force Research Lab. (United States)
Charles Woods, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 7757:
Plasmonics: Metallic Nanostructures and Their Optical Properties VIII
Mark I. Stockman, Editor(s)

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