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Tunable optofluidic liquid metal core microbubble resonator

Posted on 2020-01-15 - 22:01
This study introduces design and coupling techniques, which ingeniously 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 electrically tuned (>3 nm) over a full free spectral range because the Ohmic heating changed the refractive index of the silica. The mechanical mode was electrically tuned with a relative tuning range of 9% because the Ohmic heating changed the velocity and density of the liquid metal.

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AUTHORS (6)

Lu Qijing
Xiaogang Chen
xianlin liu
Liang Fu
Chang-Ling Zou
Shusen Xie
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