Extreme-ultraviolet frequency comb generation by polarization-gated surface-enhanced optical fields

We show that two synchronized counter-propagating femtosecond pulses could be controlled by adjusting their relative delay to excite surface-enhanced optical fields of time-gated linear polarization in contrast with intrinsic elliptic polarization excited by the conventional one-pulse incidence sche...

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Bibliographic Details
Published in:Applied physics letters 2008-08, Vol.93 (5), p.051103-051103-3
Main Authors: Wu, Jian, Qi, Hongxing, Zeng, Heping
Format: Article
Language:English
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Summary:We show that two synchronized counter-propagating femtosecond pulses could be controlled by adjusting their relative delay to excite surface-enhanced optical fields of time-gated linear polarization in contrast with intrinsic elliptic polarization excited by the conventional one-pulse incidence scheme. Such surface-enhanced optical fields can be used to generate efficient high harmonics and thus extreme-ultraviolet frequency combs. The energy conversion efficiency as well as the frequency span of the generated extreme-ultraviolet frequency combs can be significantly increased with controllable emission probabilities along different directions relative to the surface.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2967732