Geometric phase device writing on a nematic LC cell by using polarization holography

Chau Nguyen Hong Minh*, Stefan Petrov, Vera Marinova, Shiuan Huei Lin*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we propose to fabricate the Geometric Phase (GP) optical device in an nematic liquid crystal cell (NLC cell) by using photo-alignment technique with poly[1- [4-(3-carboxy-4-hydroxyphenylazo)benzenesulfonamido]-1,2-ethanediyl, sodium salt] azo-polymer (PAZO) as alignment layer. During fabrication, the necessary surface alignment pattern of GP modulations for the device is firstly created and written on the PAZO films of an empty cell by using polarization holographic method. With filling E7 LC molecule, GP grating and lens are formed. The design principle, fabrication and characterization of both GP diffractive grating and lens are presented. The results show that the device can appear as a polarization-selective transmission hologram with single diffractive order, although the thickness of cell is 5 μm. In addition, the polarization state and wavefront of diffracted wave can be converted simultaneously. Thus, the device can be named as the diffractive waveplate, which provides many unique photonic applications, becoming effective way for minimizing and integrating optical devices for a photonic modular.

Original languageEnglish
Title of host publicationPhotonic Fiber and Crystal Devices
Subtitle of host publicationAdvances in Materials and Innovations in Device Applications XVII
EditorsShizhuo Yin, Ruyan Guo
PublisherSPIE
ISBN (Electronic)9781510665781
DOIs
StatePublished - 2023
EventPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII 2023 - San Diego, United States
Duration: 20 Aug 2023 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12682
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferencePhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII 2023
Country/TerritoryUnited States
CitySan Diego
Period20/08/23 → …

Keywords

  • azo-polymer
  • geometric phase
  • GP elements
  • Liquid crystal
  • PAZO

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