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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 6 — Mar. 25, 2013
  • pp: 6826–6836

Optimization of single-cycle terahertz generation in LiNbO3 for sub-50 femtosecond pump pulses

Maksim Kunitski, Martin Richter, Mark D. Thomson, Arno Vredenborg, Jian Wu, Till Jahnke, Markus Schöffler, Horst Schmidt-Böcking, Hartmut G. Roskos, and Reinhard Dörner  »View Author Affiliations

Optics Express, Vol. 21, Issue 6, pp. 6826-6836 (2013)

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We compare different tilted-pulse-front pumping schemes for single-cycle THz generation in LiNbO3 crystals both theoretically and experimentally in terms of conversion efficiency. The conventional setup with a single lens as an imaging element has been found to be highly inefficient in the case of sub-50 fs pump pulses, mainly due to the resulting chromatic aberrations. These aberrations are avoided in the proposed new setup, which employs two concave mirrors in a Keplerian telescope arrangement as the imaging sequence. This partially compensates spherical aberrations and results in a ca. six times higher conversion efficiency in the case of 35-fs optical pump pulse duration compared to the single-lens setup. A THz field strength of 60 kV/cm was obtained using 0.5 mJ pump pulses. The divergence of the THz beam has been found experimentally to depend on the pump imaging scheme employed.

© 2013 OSA

OCIS Codes
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Nonlinear Optics

Original Manuscript: January 2, 2013
Revised Manuscript: February 15, 2013
Manuscript Accepted: February 17, 2013
Published: March 12, 2013

Maksim Kunitski, Martin Richter, Mark D. Thomson, Arno Vredenborg, Jian Wu, Till Jahnke, Markus Schöffler, Horst Schmidt-Böcking, Hartmut G. Roskos, and Reinhard Dörner, "Optimization of single-cycle terahertz generation in LiNbO3 for sub-50 femtosecond pump pulses," Opt. Express 21, 6826-6836 (2013)

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