Abstract

We show that a Cherenkov emission of terahertz waves from a femtosecond optical pulse propagating in a LiNbO3 crystal can be strongly spatially asymmetric with respect to the direction of the optical pulse propagation. We propose using this phenomenon to improve the spectral characteristics of one of the most efficient optical-to-terahertz converters: a thin LiNbO3 layer attached to a Si-prism outcoupler.

© 2014 Optical Society of America

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