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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 16496–16508

A hydrogen-bonded organic nonlinear optical crystal for high-efficiency terahertz generation and detection

Fabian D. J. Brunner, O-Pil Kwon, Seong-Ji Kwon, Mojca Jazbinšek, Arno Schneider, and Peter Günter  »View Author Affiliations

Optics Express, Vol. 16, Issue 21, pp. 16496-16508 (2008)

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Broadband THz pulses have been generated in 2-[3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene]malononitrile (OH1) by optical rectification of sub-picosecond laser pulses. We show that OH1 crystals allow velocity-matched generation and detection of THz frequencies in the whole range between 0.3 and 2.5 THz for a pump laser wavelength range from 1200 to 1460 nm. OH1 crystals show a higher figure of merit for THz generation and detection in the optimized range compared to the benchmark inorganic semiconductor crystals ZnTe and GaAs and the organic ionic salt crystal 4-N,N-dimethylamino-4′-N′-methyl stilbazolium tosylate (DAST). The material shows a low THz absorption coefficient α3 in the range between 0.3 and 2.5 THz, reaching values lower than 0.2mm-1 between 0.7 and 1.0 THz. This is similar as in ZnTe and GaAs, but much lower than in DAST in the respective optimum frequency range. A peak THz electric field of 100 kV/cm and a photon conversion efficiency of 11 percent have been achieved at a pump pulse energy of 45 µJ.

© 2008 Optical Society of America

OCIS Codes
(160.2100) Materials : Electro-optical materials
(160.4890) Materials : Organic materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(040.2235) Detectors : Far infrared or terahertz
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:

Original Manuscript: August 20, 2008
Revised Manuscript: September 15, 2008
Manuscript Accepted: September 25, 2008
Published: October 1, 2008

Fabian D. Brunner, O-Pil Kwon, Seong-Ji Kwon, Mojca Jazbinsek, Arno Schneider, and Peter Günter, "A hydrogen-bonded organic nonlinear optical crystal for high-efficiency terahertz generation and detection," Opt. Express 16, 16496-16508 (2008)

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