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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 3, Iss. 5 — May. 1, 2013
  • pp: 527–532

Temperature dependence of refractive index in blue phase liquid crystals

Chun-Wei Chen, Hung-Chang Jau, Chun-Hong Lee, Cheng-Chang Li, Chien-Tsung Hou, Chih-Wei Wu, Tsung-Hsien Lin, and I. C. Khoo  »View Author Affiliations

Optical Materials Express, Vol. 3, Issue 5, pp. 527-532 (2013)

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The refractive indices of a class of Blue-Phase liquid crystals (BPLCs) and their temperature dependence have been measured and analyzed. In general, the thermal index gradients in blue phases, BPI and BPII, are both larger than in isotropic liquid state; the index gradient of BPII phase is steeper than that of BPI, and is attributed to the difference between the expansion coefficients of simple and body-centered cubic lattices. Besides their obvious importance in photonics and nonlinear optical processes and applications, the investigation of the phase dependence of the index gradient also provides a useful way for phase identification of BPLCs, namely the second-order and weakly first order phase transitions corresponding to the ISO/BPII transition and the BPII/BPI transition.

© 2013 OSA

OCIS Codes
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.6780) Instrumentation, measurement, and metrology : Temperature
(160.3710) Materials : Liquid crystals
(160.1585) Materials : Chiral media

ToC Category:
Liquid Crystals

Original Manuscript: March 6, 2013
Revised Manuscript: March 26, 2013
Manuscript Accepted: March 26, 2013
Published: April 1, 2013

Chun-Wei Chen, Hung-Chang Jau, Chun-Hong Lee, Cheng-Chang Li, Chien-Tsung Hou, Chih-Wei Wu, Tsung-Hsien Lin, and I. C. Khoo, "Temperature dependence of refractive index in blue phase liquid crystals," Opt. Mater. Express 3, 527-532 (2013)

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