Reduced-Threshold Emission of Capillary Filled by Doped-Dye Cholesteric Liquid Crystals With Photo-Alignment Polyimide Films
A microcavity laser is reported using dye-doped cholesteric liquid crystals (CLCs) filled in a glass capillary with photo-alignment polyimide films. This laser runs based on the properties that a CLC has a refractive index much higher than that of glass, so whispering-gallery-mode (WGM) laser and di...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8269828/ |
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| Summary: | A microcavity laser is reported using dye-doped cholesteric liquid crystals (CLCs) filled in a glass capillary with photo-alignment polyimide films. This laser runs based on the properties that a CLC has a refractive index much higher than that of glass, so whispering-gallery-mode (WGM) laser and distributed-feedback-mode lasers are included in the emission spectrum. We obtain a low threshold energy of <inline-formula><tex-math notation="LaTeX">$4.5\;\mu {\rm{J}} \cdot {\rm{puls}}{{\rm{e}}^{ - 1}} \cdot {\rm{m}}{{\rm{m}}^{ - 2}}$</tex-math></inline-formula>, establish the shift of 3.04 nm of the WGMs in the temperature range 43–48 °C, and investigate electric field tunability. |
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| ISSN: | 1943-0655 |