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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 10, Iss. 21 — Oct. 21, 2002
  • pp: 1161–1166

Velocity matching by pulse front tilting for large-area THz-pulse generation

János Hebling, Gábor Almási, Ida Z. Kozma, and Jürgen Kuhl  »View Author Affiliations

Optics Express, Vol. 10, Issue 21, pp. 1161-1166 (2002)

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We propose a generally applicable velocity matching method for THz-pulse generation by optical rectification in the range below the phonon frequency of the nonlinear material. Velocity matching is based on pulse front tilting of the ultrashort excitation pulse and is able to produce a large-area THz beam. Tuning of the THz radiation by changing the tilt angle is experimentally demonstrated for a narrow line in the range between 0.8-0.97 times the phonon frequency. According to model calculations broadband THz radiation can be generated at lower frequencies. Advantages of the new velocity matching technique in comparison to the electro-optic Cherenkov effect and non-collinear beam mixing are discussed.

© 2002 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Research Papers

Original Manuscript: August 6, 2002
Revised Manuscript: September 26, 2002
Published: October 21, 2002

Janos Hebling, Gabor Almasi, Ida Kozma, and Jurgen Kuhl, "Velocity matching by pulse front tilting for large area THz-pulse generation," Opt. Express 10, 1161-1166 (2002)

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