OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 9 — Sep. 1, 2010
  • pp: 1866–1873

The complex refractive indices of the liquid crystal mixture E7 in the terahertz frequency range

Chan-Shan Yang, Chia-Jen Lin, Ru-Pin Pan, Christopher T. Que, Kohji Yamamoto, Masahiko Tani, and Ci-Ling Pan  »View Author Affiliations


JOSA B, Vol. 27, Issue 9, pp. 1866-1873 (2010)
http://dx.doi.org/10.1364/JOSAB.27.001866


View Full Text Article

Enhanced HTML    Acrobat PDF (903 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We have used terahertz time-domain spectroscopy to investigate the complex optical constants and birefringence of a widely used liquid crystal mixture E7 in both nematic and isotropic phases ( 26 ° C 70 ° C ) . The extinction coefficient of E7 at room temperature is less than 0.035 and without sharp absorption features in the frequency range of 0.2–2.0 THz. The extraordinary ( n e ) and ordinary ( n o ) indices of refraction at 26 ° C are 1.690–1.704 and 1.557–1.581, respectively, giving rise to a birefringence of 0.130–0.148 in this frequency range. The temperature-dependent ( 26 ° C 70 ° C ) order parameter extracted from the birefringence data agrees with that in the visible region quite well. Further, the temperature gradients of the terahertz optical constants of E7 are also determined. The optical constants of E7 in the terahertz or sub-millimeter wave range are found to deviate significantly from values predicated by the usual extended Cauchy equations used in the visible and near-infrared.

© 2010 Optical Society of America

OCIS Codes
(000.6850) General : Thermodynamics
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.1190) Materials : Anisotropic optical materials
(160.3710) Materials : Liquid crystals
(040.2235) Detectors : Far infrared or terahertz

ToC Category:
Ultrafast Optics

History
Original Manuscript: June 18, 2010
Revised Manuscript: July 1, 2010
Manuscript Accepted: July 5, 2010
Published: August 23, 2010

Citation
Chan-Shan Yang, Chia-Jen Lin, Ru-Pin Pan, Christopher T. Que, Kohji Yamamoto, Masahiko Tani, and Ci-Ling Pan, "The complex refractive indices of the liquid crystal mixture E7 in the terahertz frequency range," J. Opt. Soc. Am. B 27, 1866-1873 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-9-1866

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

If you are accessing the full text through a member bundle, please use the Enhanced HTML link to gain access to the citation lists and other restricted features. Note that accessing both the PDF and HTML versions of an article will count as only one download against your account.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

If you are accessing the full text through a member bundle, please use the Enhanced HTML link to gain access to the citation lists and other restricted features. Note that accessing both the PDF and HTML versions of an article will count as only one download against your account.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

If you wish to use one of your free member downloads to view the figures, click "Enhanced HTML" above and access the figures from the article itself or from the navigation tab.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

If you are accessing the full text through a member bundle, please use the Enhanced HTML link to gain access to the citation lists and other restricted features. Note that accessing both the PDF and HTML versions of an article will count as only one download against your account.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited