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.
© 2014 Optical Society of America
Lasers and Laser Optics
Original Manuscript: October 10, 2013
Revised Manuscript: February 25, 2014
Manuscript Accepted: February 28, 2014
Published: March 27, 2014
Song-Liang Chua, Ling Lu, Jorge Bravo-Abad, John D. Joannopoulos, and Marin Soljačić, "Larger-area single-mode photonic crystal surface-emitting lasers enabled by an accidental Dirac point," Opt. Lett. 39, 2072-2075 (2014)