Abstract

We report an experimental study of second-harmonic generation at a silver diffraction grating when counterpropagating surface plasmons are excited with a single pump beam. In the surface plasmon minigap, no second-harmonic light is observed in the specular direction, whereas a strong signal is detected in the direction normal to the mean plane of the grating.

© 1993 Optical Society of America

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J. Opt. Soc. Am. B 34(1) 27-37 (2017)

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