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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 13 — May. 1, 2003
  • pp: 2372–2376

Terahertz time-domain spectroscopy studies of the optical constants of the nematic liquid crystal 5CB

Tsong-Ru Tsai, Chao-Yuan Chen, Ci-Ling Pan, Ru-Pin Pan, and Xi-Cheng Zhang  »View Author Affiliations


Applied Optics, Vol. 42, Issue 13, pp. 2372-2376 (2003)
http://dx.doi.org/10.1364/AO.42.002372


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Abstract

The optical constants of a nematic liquid crystal, 4′-n-pentyl-4-cyanobiphenyl (5CB), in the frequency range 0.3–1.4 THz were determined by terahertz (THz) time-domain spectroscopy. The real parts of the extraordinary refractive index n e and the ordinary refractive index n o of 5CB varied from 1.74 to 2.04 and from 1.59 to 1.83, respectively. Liquid-crystal 5CB exhibits a relatively small absorption loss in this frequency range. The birefringence of 5CB was found to be as large as 0.21. The experimental results indicate that liquid-crystal 5CB is potentially useful for device applications in the THz frequency range.

© 2003 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.4760) Materials : Optical properties
(300.6270) Spectroscopy : Spectroscopy, far infrared
(300.6530) Spectroscopy : Spectroscopy, ultrafast
(320.7150) Ultrafast optics : Ultrafast spectroscopy

History
Original Manuscript: September 17, 2002
Revised Manuscript: December 16, 2002
Published: May 1, 2003

Citation
Tsong-Ru Tsai, Chao-Yuan Chen, Ci-Ling Pan, Ru-Pin Pan, and Xi-Cheng Zhang, "Terahertz time-domain spectroscopy studies of the optical constants of the nematic liquid crystal 5CB," Appl. Opt. 42, 2372-2376 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-13-2372


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