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Tunable optofluidic liquid metal core microbubble resonator
Optics Express ( IF 3.561 ) Pub Date : 2020-01-15 , DOI: 10.1364/oe.382514
Qijing Lu, Xiaogang Chen, Xianlin Liu, Liang Fu, Chang-Ling Zou, and Shusen Xie

This study introduces design and coupling techniques, which bridge an opaque liquid metal, optical WGM mode, and mechanical mode into an opto-mechano-fluidic microbubble resonator (MBR) consisting of a dielectric silica shell and liquid metal core. Benefiting from the conductivity of the liquid metal, Ohmic heating was carried out for the MBR by applying current to the liquid metal to change the temperature of the MBR by more than 300 °C. The optical mode was thermally tuned (>3 nm) over a full free spectral range because the Ohmic heating changed the refractive index of the silica and dimeter of the MBR. The mechanical mode was thermally tuned with a relative tuning range of 9% because the Ohmic heating changed the velocity and density of the liquid metal.
更新日期:2020-01-17

 

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