Wide-band tunable photonic bandgap device and laser in dye-doped liquid crystal refilled cholesteric liquid crystal polymer template system

Jia De Lin, Hong Lin Lin, Hsin Yu Lin, Guan Jhong Wei, Chia Rong Lee

研究成果: Conference contribution

摘要

The scientists in the field of liquid crystal (LC) have paid significant attention in the exploration of novel cholesteric LC (CLC) polymer template (simply called template) in recent years. The self-assembling nanostructural template with chirality can effectively overcome the limitation in the optical features of traditional CLCs, such as enhancement of reflectivity over 50%, multiple photonic bandgaps (PBGs), and changeable optical characteristics by flexibly replacing the refilling LC materials, and so on. This work fabricates two gradient-pitched CLC templates with two opposite handednesses, which are then merged as a spatially tunable and highly reflective CLC template sample. This sample can simultaneously reflect right- and left-circularly polarized lights and the tunable spectral range includes the entire visible region. By increasing the temperature of the template sample exceeding the clearing point of the refilling LC, the light scattering significantly decreases and the reflectance effectively increase to exceed 50% in the entire visible region. This device has a maximum reflectance over 85% and a wide-band spatial tunability in PBG between 400 nm and 800 nm which covers the entire visible region. Not only the sample can be employed as a wide-band spatially tunable filter, but also the system doping with two suitable laser dyes which emitted fluorescence can cover entire visible region can develop a low-threshold, mirror-less laser with a spatial tunability at spectral regions including blue to red region (from 484 nm to 634 nm) and simultaneous lasing emission of left- and right-circular polarizations.

原文English
主出版物標題Emerging Liquid Crystal Technologies XII 2017
編輯Liang-Chy Chien
發行者SPIE
ISBN(電子)9781510606913
DOIs
出版狀態Published - 2017 一月 1
事件2017 Emerging Liquid Crystal Technologies XII Conference, ELCT 2017 - San Francisco, United States
持續時間: 2017 一月 312017 二月 2

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
10125
ISSN(列印)0277-786X
ISSN(電子)1996-756X

Other

Other2017 Emerging Liquid Crystal Technologies XII Conference, ELCT 2017
國家/地區United States
城市San Francisco
期間17-01-3117-02-02

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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