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Chin. Opt. Lett.
 Home  List of Issues    Issue 08 , Vol. 16 , 2018    10.3788/COL201816.081401

Whispering-gallery mode lasing from polymer microsphere for humidity sensing
Wei Xu1, Chunxiang Xu1, Feifei Qin1, Yaqi Shan2, Zhu Zhu1, and Ye Zhu1
1 State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, [Southeast University], Nanjing 21 0096, China
2 School of Chemistry and Chemical Engineering, [Southeast University], Nanjing 2 11189, China

Chin. Opt. Lett., 2018, 16(08): pp.081401

Topic:Lasers and laser optics
Keywords(OCIS Code): 140.2020  160.2540  280.3420  

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.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Posted online:2018/7/30

Get Citation: Wei Xu, Chunxiang Xu, Feifei Qin, Yaqi Shan, Zhu Zhu, and Ye Zhu, "Whispering-gallery mode lasing from polymer microsphere for humidity sensing," Chin. Opt. Lett. 16(08), 081401(2018)

Note: 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.


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