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Optics Letters

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  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 10 — May. 15, 2006
  • pp: 1546–1548

Optimum excitation conditions for the generation of high-electric-field terahertz radiation from an oscillator-driven photoconductive device

André Dreyhaupt, Stephan Winnerl, Manfred Helm, and Thomas Dekorsy  »View Author Affiliations


Optics Letters, Vol. 31, Issue 10, pp. 1546-1548 (2006)
http://dx.doi.org/10.1364/OL.31.001546


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Abstract

We report the impulsive generation of terahertz (THz) radiation with a field amplitude of more than 1.5 kV cm at megahertz repetition rates, using an interdigitated photoconducting device. The approach provides an average THz power of 190 μ W , corresponding to an optical-to-THz conversion efficiency of 2.5 × 10 4 . Optimum conditions are achieved when the excitation spot size is of the order of the THz wavelength.

© 2006 Optical Society of America

OCIS Codes
(260.5150) Physical optics : Photoconductivity
(300.6270) Spectroscopy : Spectroscopy, far infrared
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors

ToC Category:
Spectroscopy

History
Original Manuscript: January 3, 2006
Manuscript Accepted: February 15, 2006

Citation
André Dreyhaupt, Stephan Winnerl, Manfred Helm, and Thomas Dekorsy, "Optimum excitation conditions for the generation of high-electric-field terahertz radiation from an oscillator-driven photoconductive device," Opt. Lett. 31, 1546-1548 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-10-1546


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