Design of Two-Dimensional Photonic Crystal Edge Emitting Laserfor Photonic Integrated Circuits

Abstract

An edge emitting laser based on two-dimensional photonic crystal slabsis proposed. The device consists of a square lattice microcavity, whichis composed of two structures with the same period but different radiusof air-holes, and a waveguide. In the cavity, laser resonance in theinner structure benefits from not only the anomalous dispersioncharacteristic of the first band-edge at the M point in the firstBrillouin-zone but also zero photon states in the outer structure. Aline defect waveguide is introduced in the outer structure forextracting photons from the inner cavity. Three-dimensionalfinite-difference time-domain simulations apparently show the in-planelaser output from the waveguide. The microcavity has an effective modevolume of about 3.2(λ/nslab)3 for oscillationmode and the quality factor of the device including line defectwaveguide is estimated to be as high as 1300.