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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 22 — Nov. 15, 2007
  • pp: 3321–3323

Transition from photocurrent surge to resonant optical rectification for terahertz generation in p - In As

Xiaodong Mu, Yujie J. Ding, and Yuliya B. Zotova  »View Author Affiliations

Optics Letters, Vol. 32, Issue 22, pp. 3321-3323 (2007)

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It has been demonstrated that the key to complete understanding of the mechanisms for terahertz (THz) generation from a p-type InAs wafer pumped by a subpicosecond Ti:sapphire amplifier lies in the dependences of the THz polarization on the azimuthal angle and polarization of the pump beam. At low enough pump intensities, photocurrent surge is the dominant mechanism for THz generation. However, the THz radiation originating from photocurrent surge is greatly reduced with increased pump intensity. Therefore, at sufficiently high pump intensities resonant optical rectification becomes the dominating mechanism for THz generation. The highest output power is measured to be 57 μ W .

© 2007 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4350) Nonlinear optics : Nonlinear optics at surfaces

ToC Category:
Nonlinear Optics

Original Manuscript: August 6, 2007
Revised Manuscript: October 11, 2007
Manuscript Accepted: October 12, 2007
Published: November 7, 2007

Xiaodong Mu, Yujie J. Ding, and Yuliya B. Zotova, "Transition from photocurrent surge to resonant optical rectification for terahertz generation in p-InAs," Opt. Lett. 32, 3321-3323 (2007)

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