4.6 Article

Controllable Liquid Crystal Micro Tube Laser

Journal

CRYSTALS
Volume 11, Issue 12, Pages -

Publisher

MDPI
DOI: 10.3390/cryst11121510

Keywords

lasers; liquid crystals; azobenzene; random lasers

Funding

  1. Ministry of Science and Technology (MOST) of Taiwan [MOST 110-2112-M-471-001, MOST 109-2112-M-259-009-MY3]

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This study demonstrates controllable random lasing emissions in a dye-doped nematic liquid crystal (DDNLC)-infiltrated microcapillary, where the emission wavelength can be adjusted by changing the focusing position of the pumped pulses. By doping azo-dyes in the DDNLC, optical controllability of the lasing intensity and wavelength can be further achieved, enabling potential applications in multicolor emitting sources, vibration sensors, and UV sensors.
This study demonstrates controllable random lasing emissions in a dye-doped nematic liquid crystal (DDNLC)-infiltrated microcapillary. The emission wavelength of the micro tube laser can be adjusted by changing the focusing position of the pumped pulses on the center or the periphery of the liquid crystal region of the microcapillary. In addition, with doping azo-dyes in the DDNLC of the micro tube laser, optical controllability of the lasing intensity and wavelength can be further achieved. The controllable micro tube laser may find highly widespread photonic applications in multicolor emitting sources, and vibration and UV sensors.

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