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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 1 — Jan. 2, 2012
  • pp: 75–80

Phase characterization in broadband THz wave detection through field-induced second harmonic generation

Liangliang Zhang, Hua Zhong, Kaijun Mu, Cunlin Zhang, and Yuejin Zhao  »View Author Affiliations

Optics Express, Vol. 20, Issue 1, pp. 75-80 (2012)

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We present a theoretical and experimental investigation of the THz pulse phase measured by a broadband heterodyne detection method via field-induced second-harmonic generation in ambient air. The dependence of the detected THz phase spectra on the positions of the wire shaped electrodes scanning along the detection plasma is discussed. An additional phase shift around the beam focus is observed. Theoretical deductions reveal that it is caused by the Gouy shift of the optical probe beam and THz beam during the heterodyne detection process.

© 2011 OSA

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(190.2620) Nonlinear optics : Harmonic generation and mixing
(350.5030) Other areas of optics : Phase
(350.5400) Other areas of optics : Plasmas

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 19, 2011
Revised Manuscript: November 27, 2011
Manuscript Accepted: December 8, 2011
Published: December 19, 2011

Liangliang Zhang, Hua Zhong, Kaijun Mu, Cunlin Zhang, and Yuejin Zhao, "Phase characterization in broadband THz wave detection through field-induced second harmonic generation," Opt. Express 20, 75-80 (2012)

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