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Optics Letters

Optics Letters


  • Vol. 36, Iss. 2 — Jan. 15, 2011
  • pp: 223–225

Contactless photoconductive terahertz generation

H. Zhang, J. K. Wahlstrand, S. B. Choi, and S. T. Cundiff  »View Author Affiliations

Optics Letters, Vol. 36, Issue 2, pp. 223-225 (2011)

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We describe a pulsed terahertz (THz) emitter that uses a rapidly oscillating, high-voltage bias across electrodes insulated from a photoconductor. Because no carriers are injected from the electrodes, trap-enhanced electric fields do not form. The resulting uniform field allows excitation with a large laser spot, lowering the carrier density for a given pulse energy and increasing the efficiency of THz generation. Compared to a dc bias, less susceptibility to damage is observed.

© 2011 Optical Society of America

OCIS Codes
(320.0320) Ultrafast optics : Ultrafast optics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:

Original Manuscript: October 19, 2010
Manuscript Accepted: November 15, 2010
Published: January 12, 2011

Virtual Issues
Vol. 6, Iss. 2 Virtual Journal for Biomedical Optics

H. Zhang, J. K. Wahlstrand, S. B. Choi, and S. T. Cundiff, "Contactless photoconductive terahertz generation," Opt. Lett. 36, 223-225 (2011)

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