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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 9 — Sep. 1, 2006
  • pp: 1822–1835

Generation of terahertz pulses through optical rectification in organic DAST crystals: theory and experiment

Arno Schneider, Max Neis, Marcel Stillhart, Blanca Ruiz, Rizwan U. A. Khan, and Peter Günter  »View Author Affiliations

JOSA B, Vol. 23, Issue 9, pp. 1822-1835 (2006)

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We present a combined theoretical and experimental investigation of the generation of few-cycle terahertz (THz) pulses via the nonlinear effect of optical rectification and of their coherent detection via electro-optic sampling. The effects of dispersive velocity matching, absorption of the optical and the THz waves, crystal thickness, pulse diameter, pump pulse duration, and two-photon absorption are discussed. The theoretical calculations are compared with the measured spectra of THz pulses that have been generated and detected in crystals of the highly nonlinear organic salt 4- N , N -dimethylamino- 4 - N -methyl stilbazolium tosylate (DAST). The results are found to be in agreement with the theory. By the selection of the optical pump wavelength between 700 and 1600 nm , we achieved several maxima of the overall generation and detection efficiency in the spectral range between 0.4 and 6.7 THz , with an optimum at 2 THz generated with 1500 nm laser pulses.

© 2006 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(160.4890) Materials : Organic materials
(190.2620) Nonlinear optics : Harmonic generation and mixing
(230.4320) Optical devices : Nonlinear optical devices
(260.3090) Physical optics : Infrared, far

ToC Category:

Original Manuscript: February 3, 2006
Revised Manuscript: April 6, 2006
Manuscript Accepted: April 7, 2006

Arno Schneider, Max Neis, Marcel Stillhart, Blanca Ruiz, Rizwan U. A. Khan, and Peter Günter, "Generation of terahertz pulses through optical rectification in organic DAST crystals: theory and experiment," J. Opt. Soc. Am. B 23, 1822-1835 (2006)

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