title: Optical characteristics of a quantum-dot laser with a metallic waveguide.
abstract: We report the optical characteristics of a quantum-dot laser with a metal-coated waveguide, which shows a large group index of 4.2 compared to 3.2 for an uncoated laser. Temperature-dependent measurements reveal a high characteristic temperature in the temperature range of 7 degrees C-25 degrees C. The optical gain, refractive index change, and linewidth enhancement factor are extracted from the measured Fabry-Perot amplified spontaneous emission spectra. We use the pulse measurements to eliminate the thermal effect and obtain a low linewidth enhancement factor of 0.35.
authors.affiliation: Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors.forename: Guo-En
authors.initials: GE
authors.lastname: Chang
authors.forename: Chien-Yao
authors.initials: CY
authors.lastname: Lu
authors.forename: Shang-Hua
authors.initials: SH
authors.lastname: Yang
authors.forename: Shun Lien
authors.initials: SL
authors.lastname: Chuang