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 language | English |
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Pages (from-to) | 4740-4747 |
Number of pages | 8 |
Journal | Journal of Materials Chemistry C |
Volume | 7 |
Issue number | 16 |
DOIs | |
Publication status | Published - 2019 |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Chemistry