In situ tuning of whispering gallery modes of levitated silica microspheres
In situ tuning of whispering gallery modes of levitated silica microspheres
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DOI：
10.1364/josab.34.000c20
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发表时间：
2016-12
影响因子：
1.9
通讯作者：
Y. Minowa;Y. Toyota;M. Ashida
中科院分区：
文献类型：
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作者：
Y. Minowa;Y. Toyota;M. Ashida
我们通过退火过程证明了二氧化硅微球在光学悬浮过程中的窃窃廊模式（WGMs）的调谐。我们根据CO2激光加热和几个冷却过程之间的功率平衡来确定退火温度。通过周围空气分子的热传导引起的冷却是主要的过程。我们在悬浮微球的白光散射光谱中观察到，在660 nm处，wgm的蓝移达到了7 nm，覆盖了40%的自由光谱范围。
We demonstrated the tuning of whispering gallery modes (WGMs) of a silica microsphere during optical levitation through the annealing process. We determined the annealing temperature from the power balance between the CO2 laser light heating and several cooling processes. Cooling caused by heat conduction through the surrounding air molecules is the dominant process. We achieved a blueshift of the WGMs as large as 7 nm at 660 nm covering 40% of the free spectral range, which was observed in the white-light scattering spectrum from the levitated microsphere.