Laser emission from tapered fiber-based liquid-crystal microsphere for sensing.
Laser emission from tapered fiber-based liquid-crystal microsphere for sensing.
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DOI：
10.1364/ol.492930
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发表时间：
2023-07
期刊：
影响因子：
3.6
通讯作者：
Dong Zhou;Na Zhao;Yuzhou Chen;Jing Sun;Yuxiang Li;Zeng-hui Peng;Y. Liu
中科院分区：
文献类型：
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作者：
Dong Zhou;Na Zhao;Yuzhou Chen;Jing Sun;Yuxiang Li;Zeng-hui Peng;Y. Liu
介绍了一种基于锥形光纤的新型液晶微球激光发射探针。在锥形光纤前端的中空玻璃微球中注入一种可调液晶（CLC）以产生激光。锥形光纤比矩形光纤更适合于液晶微球激光发射。锥形光纤基液晶微球对回音壁模式（WGM）激光有明显的抑制作用，同时也显示出明显的单模光子带隙（PBG）激光峰。锥形光纤基液晶微球对有机蒸气的刺激响应导致激光峰值波长随着气体浓度的增加而改变。此外，由锥形光纤基液晶微球产生的激光发射有望用于微环境生物传感等领域。
This Letter introduces a novel laser emission probe for liquid-crystal microspheres based on a tapered fiber. A cholesteric liquid crystal (CLC) is injected into a hollow glass microsphere (HGM) attached at the front end of a tapered fiber in order to produce laser. Tapered fibers are preferable to rectangular fibers for liquid-crystal microsphere laser emission. The whispering gallery mode (WGM) laser is significantly suppressed by the tapered fiber-based liquid-crystal microsphere, which also displays an apparent single-mode photonic bandgap (PBG) laser peak. The stimulation response of tapered fiber-based liquid-crystal microspheres to organic vapors causes a modification of the laser peak wavelength with increasing gas concentration. In addition, laser emission generated by tapered fiber-based liquid-crystal microspheres is expected to be used in fields such as microenvironmental biosensing.