title: Directional laser emission from a wavelength-scale chaotic microcavity.
abstract: We demonstrate directional output from a deformed disk laser of dimensions comparable to the emission wavelength. Unlike larger deformed cavity lasers, which exhibit universal output directionality determined by chaotic ray dynamics, the far-field patterns differ between lasing modes. The directional emission results from weak coupling of isotropic high-quality modes to anisotropic low-quality modes, combined with chiral symmetry breaking of clockwise and counterclockwise propagating waves. This mechanism makes it possible to control the output properties of wavelength-scale lasers.
authors.affiliation: Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8482, USA.
authors.forename: Q H
authors.initials: QH
authors.lastname: Song
authors.forename: L
authors.initials: L
authors.lastname: Ge
authors.forename: A D
authors.initials: AD
authors.lastname: Stone
authors.forename: H
authors.initials: H
authors.lastname: Cao
authors.forename: J
authors.initials: J
authors.lastname: Wiersig
authors.forename: J-B
authors.initials: JB
authors.lastname: Shim
authors.forename: J
authors.initials: J
authors.lastname: Unterhinninghofen
authors.forename: W
authors.initials: W
authors.lastname: Fang
authors.forename: G S
authors.initials: GS
authors.lastname: Solomon