title: Lasing modes in a spiral-shaped dielectric microcavity.
abstract: The resonance patterns and lasing modes in a spiral-shaped dielectric microcavity are investigated through passive and active medium calculations. We find that the high-Q resonance modes are whispering-gallery-like modes, and these resonance modes can be easily excited as lasing modes. We also find that the quasi-scarred resonance mode, which shows strong directional emission beams from the cavity boundary, can be excited with selectively applied external pumping. Through a spectral analysis of the time evolution of the light field, the competition between these lasing modes is discussed.
authors.affiliation: National Creative Research Intiative Center for Controlling Optical Chaos, Pai-Chai University, Daejeon, Korea.
authors.forename: Tea-Yoon
authors.initials: TY
authors.lastname: Kwon
authors.forename: Soo-Young
authors.initials: SY
authors.lastname: Lee
authors.forename: Michael S
authors.initials: MS
authors.lastname: Kurdoglyan
authors.forename: Sunghwan
authors.initials: S
authors.lastname: Rim
authors.forename: Chil-Min
authors.initials: CM
authors.lastname: Kim
authors.forename: Young-Jai
authors.initials: YJ
authors.lastname: Park