P-polarized Cherenkov THz wave radiation generated by optical rectification for a Brewster-cut LiNbO3 crystal

Pengxiang Liu, Degang Xu, Changming Liu, Da Lv, Yingjin Lv, Peng Wang, Jianquan Yao

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4 Scopus citations

Abstract

In this paper, we investigated p-polarized Cherenkov radiation excited by an ultra-short laser pulse focused into a line in an LiNbO3 crystal. The geometries of p-and s-polarized THz generation were both analyzed. We did further calculations on p-polarized THz radiation and designed a Brewster-cut geometry. The radiated energy and conversion efficiency were roughly estimated. Compared with s-polarized waves radiated from a Cherenkov-cut crystal, p-polarized THz radiation has lower energy and conversion efficiency, but higher intensity and better beam quality. The effect of angular dispersion between the spectral components of the THz pulse after refraction at the Brewster surface was also discussed.

Original languageEnglish
Article number085202
JournalJournal of Optics
Volume13
Issue number8
DOIs
StatePublished - 2011
Externally publishedYes

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