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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 18 — Sep. 15, 2013
  • pp: 3687–3689

THz-wave sensing via pump and signal wave detection interacted with evanescent THz waves

Takuya Akiba, Naoya Kaneko, Koji Suizu, Katsuhiko Miyamoto, and Takashige Omatsu  »View Author Affiliations


Optics Letters, Vol. 38, Issue 18, pp. 3687-3689 (2013)
http://dx.doi.org/10.1364/OL.38.003687


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Abstract

We report a novel sensing technique that uses an evanescent terahertz (THz) wave, without detecting the THz wave directly. When a THz wave generated by Cherenkov phase matching via difference frequency generation undergoes total internal reflection, the evanescent THz wave is subject to a phase change and an amplitude decrease. The reflected THz wave, under the influence of the sample, interferes with the propagating THz wave and the changing electric field of the THz wave interacts with the electric field of the pump waves. We demonstrate a sensing technique for detecting changes in the electric field of near-infrared light, transcribed from changes in the electric field of a THz wave.

© 2013 Optical Society of America

OCIS Codes
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(260.6970) Physical optics : Total internal reflection
(190.4223) Nonlinear optics : Nonlinear wave mixing
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Spectroscopy

History
Original Manuscript: July 22, 2013
Revised Manuscript: August 21, 2013
Manuscript Accepted: August 22, 2013
Published: September 13, 2013

Citation
Takuya Akiba, Naoya Kaneko, Koji Suizu, Katsuhiko Miyamoto, and Takashige Omatsu, "THz-wave sensing via pump and signal wave detection interacted with evanescent THz waves," Opt. Lett. 38, 3687-3689 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-18-3687


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