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physics.optics2026
Directional Emission From High-Q Asymmetric Hollow Whispering Gallery Resonators
Amal Jose, Ramgopal Madugani, Christophe Pin +1
Whispering gallery mode (WGM) resonators with broken rotational symmetry exhibit phenomena that are generally absent in conventional symmetric cavities, including directional emiss…
physics.optics2026
Spectral and spatial filtering of whispering gallery modes in precision-engineered microbubble resonators
Ramgopal Madugani, Amal Jose, Christophe Pin +3
Similar to microspheres, thin-walled microbubble resonators support whispering gallery modes (WGMs) that combine ultrahigh Q-factors and small effective mode volumes. In contrast,…