Compensation of thermal effect in high-Q toroidal microresonators by PDMS coating


We theoretically and experimentally demonstrate that thermal effect in ultra-high-Q silica toroidal microresonators can be compensated by applying a layer of polydimethylsiloxane (PDMS). The observed Q factor is 1.5&#x00D7;10<sup>6</sup> for coating thickness of 0.52 &#x00B5;m. 


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