A thermally tunable narrowband selector based on a chiral nematic containing a binary thermosensitive chiral dopant mixture

Zong Han Yang, Yu Cheng Hsiao, Dong Shen, Wei Lee*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We employed a thermosensitive chiral dopant (CD), characterized by its thermoinduced change in helical twisting power (HTP) in terms of the handedness and strength, to shift the Bragg reflection band of a CLC. A thermally tunable photonic bandgap (PBG) device was demonstrated using a one-dimensional asymmetric photonic crystal (PC) infiltrated with the CLC as a defect layer. With a temperature controller to shift the PBG of the CLC, two narrow transmission bands can be tuned in the spectrum dominated by the asymmetric PC structure. This optical device can find applications as a tunable narrowband wavelength selector or an intensity controller.

Original languageEnglish
Pages (from-to)19-25
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Volume644
Issue number1
DOIs
StatePublished - 11 Feb 2017

Keywords

  • Cholesteric liquid crystals
  • photonic crystals
  • thermosensitive chiral dopant

Fingerprint

Dive into the research topics of 'A thermally tunable narrowband selector based on a chiral nematic containing a binary thermosensitive chiral dopant mixture'. Together they form a unique fingerprint.

Cite this