Journal
OPTICS EXPRESS
Volume 17, Issue 11, Pages 9323-9329Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.009323
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Funding
- RFBR [08-02-00988, 08-02-92216]
- Japanese Society of Promotion of Science
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We propose to launch terahertz surface plasmon polaritons on a structured metal surface by using a femtosecond laser pulse obliquely incident on a strip of an electro-optic material deposited on the surface. The laser pulse creates a nonlinear polarization that moves along the strip with a superluminal velocity and emits surface terahertz waves via the Cherenkov radiation mechanism. We calculate the radiated fields and frequency distribution of the radiated energy for a grooved perfect-conductor surface with a GaAs strip illuminated by Ti:sapphire laser. This technique can be used to perform surface terahertz spectroscopy. (C) 2009 Optical Society of America
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