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Whispering-gallery mode lasing from polymer microsphere for humidity sensing

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Abstract

Microlasers based on high quality (Q) whispering-gallery mode (WGM) resonance are promising low threshold laser sources for bio-sensing and imaging applications. In this Letter, dye-doped polymer microspheres were fabricated by a controlling emulsion solvent evaporation method. WGM lasing with low threshold and high Q factors was realized in an individual microsphere under femtosecond laser pumping. The slight change of environmental relative humidity (RH) can be monitored by measuring the shift of the lasing modes at the exposure of water molecules, which demonstrates the sensitivity is as high as 6 pm/RH%. The results would offer an insight into employing microlasers as sensors.

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DOI:10.3788/col201816.081401

所属栏目:Lasers and laser optics

基金项目:This work was supported by the National Natural Science Foundation of China (NSFC) (No. 61275054) and the Science and Technology Support Program of Jiangsu Province (No. BE2016177), and the authors also thank the “Collaborative Innovation Center of Suzhou Nano Science and Technology” for their support.

收稿日期:2018-04-09

录用日期:2018-06-06

网络出版日期:2018-07-30

作者单位    点击查看

Wei Xu:State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
Chunxiang Xu:State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
Feifei Qin:State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
Yaqi Shan:School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
Zhu Zhu:State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
Ye Zhu:State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China

联系人作者:Chunxiang Xu(xcxseu@seu.edu.cn)

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引用该论文

Wei Xu, Chunxiang Xu, Feifei Qin, Yaqi Shan, Zhu Zhu, Ye Zhu, "Whispering-gallery mode lasing from polymer microsphere for humidity sensing," Chinese Optics Letters 16(8), 081401 (2018)

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