12 September 2026: Latest Publication - APL Photonics

We theoretically and experimentally investigate the optomechanical transduction mechanism in a system of two coupled microresonators under different coupling scenarios, categorized into electromagnetically induced transparency, intermediate, and Autler–Townes splitting regimes. We show that interference between the dispersion and dissipation channels gives rise to an asymmetric line shape in the optomechanical spectrum. These effects are experimentally demonstrated using a fiber taper-coupled whispering gallery resonator system consisting of a microbubble resonator and a micropendulum. Finally, we conduct a comprehensive analysis of the optical forces between the microbubble and the micropendulum and propose that an experimentally feasible trapping scheme is achievable, even in the presence of strong optomechanical interference.