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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 7 — Jul. 1, 2011
  • pp: 1724–1734

Terahertz generation with tilted-front laser pulses: dynamic theory for low-absorbing crystals

Michael I. Bakunov, Sergey B. Bodrov, and Eugene A. Mashkovich  »View Author Affiliations


JOSA B, Vol. 28, Issue 7, pp. 1724-1734 (2011)
http://dx.doi.org/10.1364/JOSAB.28.001724


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Abstract

A theory of terahertz emission from a femtosecond laser pulse with a tilted intensity front propagating through a prism-shaped electro-optic crystal is developed. The theory accounts for transient effects at the entrance boundary of the crystal and allows us to explore the dynamics of terahertz generation in the crystal. In particular, transverse walkoff length is introduced as an important parameter of the terahertz field formation process. Two typical experimental situations— LiNbO 3 excited with a Ti:sapphire laser ( 0.8 μm wavelength) at room and cryogenic temperatures—are considered, and new schemes, in which GaAs at room temperature is excited at 1.8 and 3.5 μm , are proposed and analyzed. The parameters of the laser pulse (transverse size, tilt angle, and pulse duration) and crystal size maximizing the terahertz yield are calculated.

© 2011 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.3090) Physical optics : Infrared, far

ToC Category:
Nonlinear Optics

History
Original Manuscript: March 22, 2011
Revised Manuscript: May 13, 2011
Manuscript Accepted: May 19, 2011
Published: June 21, 2011

Citation
Michael I. Bakunov, Sergey B. Bodrov, and Eugene A. Mashkovich, "Terahertz generation with tilted-front laser pulses: dynamic theory for low-absorbing crystals," J. Opt. Soc. Am. B 28, 1724-1734 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-7-1724

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