Terahertz emission from nano-structured metal surfaces

Welsh, Gregor and Hunt, Neil and Wynne, Klaas; Corkum, P and Jonas, D and Miller, RJD and Weiner, AM, eds. (2007) Terahertz emission from nano-structured metal surfaces. In: Ultrafast Phenomena XV. Springer series in chemical physics . Springer-Verlag Berlin, USA, pp. 778-780. ISBN 9783540687795

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Abstract

Nanostructured metal surfaces were created by depositing a 30 nm layer of bulk gold onto a periodic fused silica transmission grating. By exciting this with a femtosecond laser beam, in air, results in terahertz radiation being produced. This emission is angle dependent. Furthermore, the emitted radiation has a third order power dependence ruling out the chi((2)) process, optical rectification.