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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 17 — Aug. 18, 2008
  • pp: 12794–12805

Quasi-near field terahertz generation and detection.

Reshmi Chakkittakandy, Jos. A. W. M. Corver, and Paul C. M. Planken  »View Author Affiliations

Optics Express, Vol. 16, Issue 17, pp. 12794-12805 (2008)

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We describe a simple terahertz (THz) time domain spectrometer with a bandwidth extending up to 7.5 THz. We show that by keeping the generation and detection crystals close to each other a high signal-to-noise ratio (SNR) can be achieved without using lock-in detection and dry nitrogen flushing. The observed spectra show very good agreement with the spectra calculated based on a simple model which includes phase matching and absorption in the generation and detection crystals. Using this set-up we have measured the absorption lines in D-tartaric acid from 0.5 THz up to 7 THz. We show that the high frequency region >3 THz is the better choice to measure small changes in the water content of a hygroscopic sample compared to the low frequency region.

© 2008 Optical Society of America

OCIS Codes
(320.7160) Ultrafast optics : Ultrafast technology
(040.2235) Detectors : Far infrared or terahertz
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:

Original Manuscript: July 11, 2008
Revised Manuscript: August 4, 2008
Manuscript Accepted: August 5, 2008
Published: August 7, 2008

Reshmi Chakkittakandy, Jos A. Corver, and Paul C. Planken, "Quasi-near field terahertz generation and detection," Opt. Express 16, 12794-12805 (2008)

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