title: Design of photonic-crystal surface-emitting lasers with circularly-polarized beam.
abstract: We propose new structure of photonic-crystal surface-emitting lasers with oblique-triangular-prism-shaped air holes for direct emission of circularly polarized beam. We show appropriate height and tilt angle of oblique-triangular-prism-shaped air holes to achieve high degree of polarization. Secondly, we investigate the influence of cavity length. High degree of polarization can be obtained by appropriate air-hole shape and cavity length. We also show that right-handed or left-handed circular polarization can be chosen by changing tilt direction of air holes.
authors.forename: Masaya
authors.initials: M
authors.lastname: Nishimoto
authors.forename: Kyohei
authors.initials: K
authors.lastname: Maekawa
authors.forename: Susumu
authors.initials: S
authors.lastname: Noda