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  • Title: Cherenkov emission of terahertz surface plasmon polaritons from a superluminal optical spot on a structured metal surface.
    Author: Bakunov MI, Tsarev MV, Hangyo M.
    Journal: Opt Express; 2009 May 25; 17(11):9323-9. PubMed ID: 19466184.
    Abstract:
    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.
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