title: Angular emission characteristics of quantum cascade spiral microlasers.
abstract: We perform ray and wave simulations of passive and active spiral-shaped optical microcavities, comparing our results to experimental data obtained with mid-infrared quantum cascade spiral microlasers. Focusing on the angular emission characteristics, we find that both ray and wave simulations are consistent with the experimental data, showing richly-featured, multidirectional far-field emission patterns in the case of uniform pumping and TM-polarized light. Active cavity simulations using the Schr odinger-Bloch model indicate that selective pumping of the quantum cascade spiral microlasers near the resonator boundary will yield unidirectional laser emission.
authors.affiliation: Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany. martina@pks.mpg.de
authors.forename: Martina
authors.initials: M
authors.lastname: Hentschel
authors.forename: Tae-Yoon
authors.initials: TY
authors.lastname: Kwon
authors.forename: Mikhail A
authors.initials: MA
authors.lastname: Belkin
authors.forename: Ross
authors.initials: R
authors.lastname: Audet
authors.forename: Federico
authors.initials: F
authors.lastname: Capasso
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007259:Infrared Rays; D007834:Lasers; D008904:Miniaturization; D008962:Models, Theoretical; D011789:Quantum Theory; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D014159:Transducers