Microresonatorbased
Microresonator-based devices refer to systems in which light is confined and stored in a small optical resonator to amplify light–matter interactions. Common architectures include ring and disk resonators, whispering-gallery-mode structures, and photonic-crystal cavities. These devices typically exhibit high quality factors and small mode volumes, enabling long photon lifetimes and strong nonlinearities even at modest input powers.
Operation relies on evanescent coupling between a waveguide and the resonator, allowing light to enter and
Materials and fabrication platforms for microresonator-based devices include silicon nitride, silicon-on-insulator, lithium niobate on insulator, aluminum
Applications are diverse. Microresonator-based Kerr frequency combs serve precision metrology, optical clocks, spectroscopy, and wavelength-division multiplexed
Challenges include fabrication variability leading to resonance offset, thermal detuning, reliable dispersion control, and packaging for