Geodesic photon coupling and non-Hermitian exceptional point of microcavities on topologically curved space
arXiv:2201.10223 · doi:10.1038/s41377-022-01009-x
Abstract
Asymmetric microcavities supporting Whispering-gallery modes (WGMs) are of great significance for on-chip optical information processing. We define asymmetric microcavities on topologically curved surfaces, where the geodesic light trajectories completely reconstruct the cavity mode features. The quality factors of the lossy chaotic and island modes in flat cavities can be increased by up to ~200 times by the space curvature. Strong and weak coupling between modes of very different origins occur when the space curvature brings them into resonance, leading to a fine tailoring of the cavity photon energy and lifetime. Finally, we prove that by varying the overall loss, an exceptional point can be clearly observed at which both the cavity photon energy and lifetime become degenerate. Our work is at the crosspoint of optical chaotic dynamics, non-Hermitian physics and geodesic optical devices, and would open the novel area of geodesic microcavity photonics.
arXiv commentarXiv admin note: text overlap with arXiv:2011.12621
References in corpus (11)
- Ray and wave chaos in asymmetric resonant optical cavities
- Experimental realization of optomechanically induced non-reciprocity
- Observation of non-Hermitian degeneracies in a chaotic exciton-polariton billiard
- Observation of an exceptional point in a chaotic optical microcavity
- Trapping light by mimicking gravitational lensing
- Pushing the Limit of High-Q Mode of a Single Subwavelength Dielectric Nanocavity
- Demonstration of a Chip-based Nonlinear Optical Isolator
- Directional emission from asymmetric resonant cavities
- Definite photon deflections of topological defects in metasurfaces and symmetry-breaking phase transitions with material loss
- An Exciton-Polariton Fano Resonance Driven by Second Harmonic Generation
- Möbius Strip Microlasers: a Testbed for Non-Euclidean Photonics