title: Level-crossing and modal structure in microdroplet resonators.
abstract: We fabricate a liquid-core liquid-clad microcavity that is coupled to a standard tapered fiber, and then experimentally map the whispering-gallery modes of this droplet resonator. The shape of our resonator is similar to a thin prolate spheroid, which makes space for many high-order transverse modes, suggesting that some of them will share the same resonance frequency. Indeed, we experimentally observe that more than half of the droplet's modes have a sibling having the same frequency (to within linewidth) and therefore exhibiting a standing interference-pattern.
authors.forename: Sarah T
authors.initials: ST
authors.lastname: Attar
authors.forename: Vladimir
authors.initials: V
authors.lastname: Shuvayev
authors.forename: Lev
authors.initials: L
authors.lastname: Deych
authors.forename: Leopoldo L
authors.initials: LL
authors.lastname: Martin
authors.forename: Tal
authors.initials: T
authors.lastname: Carmon