A broadban-tunable photonic bandgap and thermally convertible laser with an ultra-low lasing threshold from a refilled chiral polymer template

Jia De Lin, Hsin Yu Lin, Guan Jhong Wei, Yu Chou Chuang, Lin Jer Chen, Ting Shan Mo, Chia Rong Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

This study demonstrates a broadband-tunable photonic bandgap (PBG) and thermally convertible laser with an ultra-low lasing threshold based on a gradient-pitched cholesteric liquid crystal (CLC) polymer template. The lowest energy threshold of the laser is 16 nJ per pulse under a pumped diameter of ca. 250 μm (i.e., 0.33 μJ per pulse per mm2), a value that is superior to those of other band-edge lasers based on most dye/quantum-dot-doped CLC systems. Owing to its multiple advantages, such as high stability, ultra-low lasing threshold, wide-band and linear spatial PBG-tunability, and lasing-mode convertibility, the CLC template device can be potentially used for photonics and display applications.

Original languageEnglish
Pages (from-to)4740-4747
Number of pages8
JournalJournal of Materials Chemistry C
Volume7
Issue number16
DOIs
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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