Coupled-mode induced transparency via Ohmic heating in a single polydimethylsiloxane-coated microbubble resonator

• DOI: 10.1364/oe.390593
• Publication Date: 2020-03-17T14:00:08Z
• Authors: Xianlin Liu; Qijing Lu; Liang Fu; Xiaogang Chen; Xiang Wu; Shusen Xie
• Keywords: Microheater; Polydimethylsiloxane; Ohmic contact

We demonstrate an approach for the realization of coupled-mode induced transparency (CMIT) in a hybrid polydimethylsiloxane (PDMS)-coated silica microbubble resonator, with Au microwire inserted hollow channel. Owing to large negative thermo-optics coefficient PDMS, different radial order modes opposite thermal sensitivities can coexist this microcavity. By applying current through microwire, which acts as microheater, generated Ohmic heating could thermally tune resonance frequencies and frequency detuning coupled mode achieve controllable CMIT. This platform offers efficient convenient way obtain CMIT applications, such label-free biosensing quantum information processing.