Generation, tuning, and shaping of narrowband, picosecond THz pulses by two-beam excitation

被引：48
|
作者：
Stepanov, AG [1 ]
Hebling, J
Kuhl, J
机构：
[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[2] Univ Pecs, Dept Expt Phys, H-7624 Pecs, Hungary
[3] Hungarian Acad Sci, Res Grp Nonlinear & Quantum Opt, H-1051 Budapest, Hungary
来源：
OPTICS EXPRESS | 2004年 / 12卷 / 19期
关键词：
D O I：
10.1364/OPEX.12.004650
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate the use of a transient polarization grating induced by two femtosecond laser pulses propagating in a LiNbO3 crystal for the generation of frequency tunable, narrow-band, picosecond THz pulses. Employing pump pulses with 150 fs duration and 2 muJ energy, the generated THz pulse has an energy up to 1.8 pJ, a pulse duration of 3 - 5 ps and a bandwidth of 0.1 THz. The central frequency can be tuned in the range from 0.5 to 3 THz. The generation efficiency of the transient grating method in comparison to other techniques is discussed. The possibility of shaping the temporal waveform of the THz pulses by simply shaping the spatial intensity distribution of the pump pulses is demonstrated. (C) 2004 Optical Society of America.
引用
收藏
页码：4650 / 4658
页数：9
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