Optically controllable linear-polarization rotator using chiral-azobenzene-doped liquid crystals

Cheng Kai Liu, Chian Yu Chiu, Stephen M. Morris, Min Cheng Tsai, Chii Chang Chen, Ko Ting Cheng

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


A linear-polarization rotator based on the optically tunable pitch of chiral-azobenzenedoped liquid crystals (CAdLCs) has been investigated. It is shown that the orientation of linearly polarized (LP) light can be optically tuned using CAdLCs and that the transmitted light possesses a good degree of linear polarization (DoLP). Experimental and simulation (4 × 4 Berreman matrix) results show that the rotation angle is dependent on the pitch as well as the number of turns of the cholesteric LC helix. Some causes to affect the DoLP of the output LP lights during photoisomerization are also discussed. Moreover, a calibration term, β(t), is also introduced to elucidate the behavior of the discontinuous change of the CAdLC pitch in a fixed cell thickness.

Original languageEnglish
Article number1299
Issue number11
StatePublished - 13 Nov 2017


  • Chiral azobenzene
  • Liquid crystal
  • Polarization


Dive into the research topics of 'Optically controllable linear-polarization rotator using chiral-azobenzene-doped liquid crystals'. Together they form a unique fingerprint.

Cite this