title: Whispering gallery resonators for studying orbital angular momentum of a photon.
abstract: We propose a simple method for generation and detection of photons with nonzero angular momentum. The method utilizes high-quality factor ring resonators that transform a plane electromagnetic wave into a wave with nonzero angular momentum, and vice versa. We show that the method is especially promising for studying high-order Bessel beams, unreachable by other techniques.
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, USA.
authors.forename: Andrey B
authors.initials: AB
authors.lastname: Matsko
authors.forename: Anatoliy A
authors.initials: AA
authors.lastname: Savchenkov
authors.forename: Dmitry
authors.initials: D
authors.lastname: Strekalov
authors.forename: Lute
authors.initials: L
authors.lastname: Maleki