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

A. G. Stepanov, J. Hebling, J. Kuhl

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

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 μJ 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.

Original languageEnglish
Pages (from-to)4650-4658
Number of pages9
JournalOptics Express
Volume12
Issue number19
DOIs
Publication statusPublished - 2004

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picosecond pulses
narrowband
tuning
pulses
excitation
gratings
pumps
waveforms
pulse duration
bandwidth
energy
polarization
crystals
lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Generation, tuning, and shaping of narrowband, picosecond THz pulses by two-beam excitation. / Stepanov, A. G.; Hebling, J.; Kuhl, J.

In: Optics Express, Vol. 12, No. 19, 2004, p. 4650-4658.

Research output: Contribution to journalArticle

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