title: Square-lattice photonic-crystal vertical-cavity surface-emitting lasers.
abstract: The single mode square lattice photonic-crystal vertical-cavity surface-emitting lasers (PC-VCSELs) are proposed and demonstrated. Square-lattice photonic-crystal patterns of various lattice constants are introduced on top mirrors of VCSELs having two different current apertures. The maximum single mode output power of about 1 mW is obtained from the device with lattice constant of 5.0 m and current aperture of 16 m. The PC-VCSEL operates in a single transverse mode in an entire operating current range with a side-mode suppression ratio of over 20 dB. The asymmetric introduction of smaller air holes improves the polarization selectivity.
authors.forename: Keum-Hee
authors.initials: KH
authors.lastname: Lee
authors.forename: Jong-Hwa
authors.initials: JH
authors.lastname: Baek
authors.forename: In-Kag
authors.initials: IK
authors.lastname: Hwang
authors.forename: Yong-Hee
authors.initials: YH
authors.lastname: Lee
authors.forename: Gyu-Han
authors.initials: GH
authors.lastname: Lee
authors.forename: Jung-Hoon
authors.initials: JH
authors.lastname: Ser
authors.forename: Hee-Dae
authors.initials: HD
authors.lastname: Kim
authors.forename: Hyun-Eoi
authors.initials: HE
authors.lastname: Shin