p-polarized Cherenkov THz wave radiation generated by optical rectification for a Brewster-cut LiNbO<sub>3</sub> crystal
Liu, Pengxiang; Xu, Degang; Liu, Changming; Lv, Da; Lv, Yingjin; Wang, Peng; Yao, Jianquan; Liu, Pengxiang; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China; Xu, Degang; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China; Liu, Changming; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China; Lv, Da; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China; Lv, Yingjin; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China; Wang, Peng; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China; Yao, Jianquan; The Institute of Lasers and Opto-electronics, The College of Precision Instruments and Opto-electronic Engineering, Tianjin University, Tianjin 300072, People’s Republic of China ; Key Laboratory of Opto-electronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, People’s Republic of China
Журнал:
Journal of Optics
Дата:
2011-08-01
Аннотация:
In this paper, we investigated p-polarized Cherenkov radiation excited by an ultra-short laser pulse focused into a line in an LiNbO<sub>3</sub> 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.
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