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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 13 — May. 1, 2003
  • pp: 2366–2371

Complex refractive-index spectrum of liquid crystal in the infrared

Mitsunori Saito and Teruyuki Yasuda  »View Author Affiliations


Applied Optics, Vol. 42, Issue 13, pp. 2366-2371 (2003)
http://dx.doi.org/10.1364/AO.42.002366


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Abstract

The ordinary and extraordinary complex refractive indices, n o - jκ o and n e - jκ e , of a nematic liquid crystal were measured in the infrared region at 3.0–11.5-µm wavelength. The complex refractive indices were evaluated in terms of the angular dependence of the reflectance. Semicylindrical CsI prisms and a goniometer were used for measurement of the reflectance in a wide incident-angle range and throughout the wide infrared spectral region. Refractive indices n o and n e changed notably near the absorption wavelength. Negative birefringence, i.e., n e < n o , was observed in the vicinity of 6.6 µm, where n e changed more than did n o .

© 2003 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(120.5700) Instrumentation, measurement, and metrology : Reflection
(160.3710) Materials : Liquid crystals
(260.1440) Physical optics : Birefringence
(260.3060) Physical optics : Infrared

History
Original Manuscript: November 19, 2001
Revised Manuscript: October 3, 2003
Published: May 1, 2003

Citation
Mitsunori Saito and Teruyuki Yasuda, "Complex refractive-index spectrum of liquid crystal in the infrared," Appl. Opt. 42, 2366-2371 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-13-2366

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