title: Larger-area single-mode photonic crystal surface-emitting lasers enabled by an accidental Dirac point.
abstract: By altering the lattice geometry of the photonic crystal (PhC) surface-emitting lasers (PCSELs), we tune the regular lasing band edges of quadratic dispersions to form a single accidental Dirac point of linear dispersion at the Brillouin zone center. This not only increases the mode spacing by orders of magnitude but also eliminates the distributed in-plane feedback to enable single-mode PCSELs of substantially larger area and thus substantially higher output power. The advantages of using accidental Dirac cones are systematically evaluated through two-dimensional in-plane calculations and confirmed by three-dimensional simulations of PhC slab devices.
authors.forename: Song-Liang
authors.initials: SL
authors.lastname: Chua
authors.forename: Ling
authors.initials: L
authors.lastname: Lu
authors.forename: Jorge
authors.initials: J
authors.lastname: Bravo-Abad
authors.forename: John D
authors.initials: JD
authors.lastname: Joannopoulos
authors.forename: Marin
authors.initials: M
authors.lastname: Soljačić