Thermodielectric generation of defect modes in a photonic liquid crystal

Yu Cheng Hsiao, Hsiao Tsung Wang, Wei Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Photonic defect modes induced by in situ formation of an ill-defined defect layer is demonstrated in a cholesteric liquid crystal (CLC). The local deformation of the one-dimensionally periodic helical structure is achieved by means of the thermodielectric effect, which alters the pitch in the middle of the cholesteric structure. The defect-mode peak in the photonic band gap appears in the transmission spectrum only when the incident circularly polarized light has the same handedness as that of the CLC structure. The wavelength of the deformation-induced defect mode can be tuned upon varying the dielectric heating power by simply applying a frequency-modulated voltage.

Original languageEnglish
Pages (from-to)3593-3599
Number of pages7
JournalOptics Express
Volume22
Issue number3
DOIs
Publication statusPublished - Feb 10 2014
Externally publishedYes

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liquid crystals
photonics
defects
handedness
polarized light
crystal structure
heating
electric potential
wavelengths

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Thermodielectric generation of defect modes in a photonic liquid crystal. / Hsiao, Yu Cheng; Wang, Hsiao Tsung; Lee, Wei.

In: Optics Express, Vol. 22, No. 3, 10.02.2014, p. 3593-3599.

Research output: Contribution to journalArticle

Hsiao, Yu Cheng ; Wang, Hsiao Tsung ; Lee, Wei. / Thermodielectric generation of defect modes in a photonic liquid crystal. In: Optics Express. 2014 ; Vol. 22, No. 3. pp. 3593-3599.
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