Coupling of terahertz radiation to metallic wire using end‐fire technique

Autor:	André G. Edelmann, Jürgen Jahns, Lothar Moeller
Rok vydání:	2013
Předmět:	Materials science business.industry Terahertz radiation Surface plasmon Physics::Optics Surface plasmon polariton Coupling (electronics) Axicon Optics Polariton Optoelectronics Electrical and Electronic Engineering business Plasmon Localized surface plasmon
Zdroj:	Electronics Letters. 49:884-886
ISSN:	1350-911X 0013-5194
DOI:	10.1049/el.2013.1429
Popis:	Coupling of THz radiation at 625 GHz onto a copper wire is demonstrated. The end-fire technique is used in combination with an axicon to excite the azimuthally polarised surface plasmon polaritons on the wire‘s front facet. A small lateral offset of the wire relative to the optical axis is used to achieve significant plasmon excitation. Coupling efficiencies of about 17% were measured. The coupling mechanism is discussed theoretically using the overlap integral and verify plasmonic excitation and propagation by measuring the radiated field at the wire end.
Databáze:	OpenAIRE
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