| Autor: |
Qiu-Lan Huang, Huai-Liang Xu, Mu-Tian Li, Zhi-Shan Hou, Chao Lv, Xue-Peng Zhan, He-Long Li, Hong Xia, Hai-Yu Wang, Hong-Bo Sun |
| Zdroj: |
Journal of Lightwave Technology; Feb2018, Vol. 36 Issue 3, p819-824, 6p |
| Abstrakt: |
Optical microcavities have been widely employed for sensing and detection, because of their ultrasensitive responsiveness to surrounding environment. Here we report an active diskshaped whispering gallery mode (WGM) microcavity fabricated from a water-sensitive material of dye-doped PEG-DA hydrogel through two-photon polymerization. We demonstrate that as the environment humidity changes the microcavity can homogenously expand or shrink to keep the disk-shaped structure, producing stable WGM lasing emissions.We further show that the WGM wavelength of the microlaser shifts linearly as the humidity increases from 25% to 65%, resulting in a wavelength variation of about 1.72 nm, which indicates that the stretchable microlaser can be acted as a humidity sensor. Due to the "smart" response of humidity and biocompatibility of PEG-DA hydrogel material, our results provide a way to the design and fabrication of flexible PEG-DA hydrogel biochips for biomedical applications. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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