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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 8 — Aug. 1, 2008
  • pp: 1261–1264

Optically induced voltage pulses by resonant excitation of a passive GaAs photoconductive switch

Gabriel C. Loata, Mark Bieler, Günter Hein, and Uwe Siegner  »View Author Affiliations

JOSA B, Vol. 25, Issue 8, pp. 1261-1264 (2008)

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We have investigated the all-optical generation of ultrashort voltage pulses that are launched by resonant excitation of a passive GaAs photoconductive switch with no electric bias field applied. Due to a specially designed geometry, we can distinguish between electrical transients generated in the Schottky field region of the metal/GaAs contact and shift currents resulting from nonlinear optical effects in the GaAs material. The shift current contribution is smaller than the Schottky field contribution but possesses a higher bandwidth with frequency components exceeding 1 THz . For small bias fields, the contribution of all-optically-generated currents to the overall voltage signal may be significant and needs to be accounted for when modeling photoconductive switches.

© 2008 Optical Society of America

OCIS Codes
(230.0250) Optical devices : Optoelectronics
(320.7080) Ultrafast optics : Ultrafast devices

ToC Category:
Ultrafast Optics

Original Manuscript: April 4, 2008
Revised Manuscript: May 30, 2008
Manuscript Accepted: June 1, 2008
Published: July 15, 2008

Gabriel C. Loata, Mark Bieler, Günter Hein, and Uwe Siegner, "Optically induced voltage pulses by resonant excitation of a passive GaAs photoconductive switch," J. Opt. Soc. Am. B 25, 1261-1264 (2008)

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