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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 14 — Jul. 11, 2005
  • pp: 5353–5362

Large-area electro-optic ZnTe terahertz emitters

T. Löffler, T. Hahn, M. Thomson, F. Jacob, and H. G. Roskos  »View Author Affiliations

Optics Express, Vol. 13, Issue 14, pp. 5353-5362 (2005)

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We present a detailed experimental and theoretical study of terahertz (THz) generation and beam propagation in an optoelectronic THz system consisting of a large-area (ZnTe) electro-optic emitter and a standard electro-optic detector, and provide a comparison to typical biased GaAs emitters. As predicted by theory, in the absence of saturation the generated THz pulse energy is inversely proportional to the area of the optical pump beam incident on the emitter, although the detected on-axis electric field amplitude of the subsequently focused THz beam is practically independent of this area. This latter result promotes the use of larger emitter crystals in amplifier-laser-based THz systems in order to minimize saturation effects. Moreover, the generation of an initially larger THz beam also provides improved spatial resolution at intermediate foci between emitter and detector.

© 2005 Optical Society of America

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.3090) Physical optics : Infrared, far

ToC Category:
Research Papers

Original Manuscript: June 1, 2005
Revised Manuscript: June 24, 2005
Published: July 11, 2005

T. Löffler, T. Hahn, M. Thomson, F. Jacob, and H. Roskos, "Large-area electro-optic ZnTe terahertz emitters," Opt. Express 13, 5353-5362 (2005)

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