title: Metal-cavity quantum-dot lasers with enhanced thermal performance.
abstract: We designed, fabricated, and characterized thermal performances of Fabry-Pérot quantum-dot lasers with both metal-coated and conventional dielectric waveguides. With proper design, metals, such as Ag, Au, Cu, and Al can function as a low loss waveguide wall as well as an efficient heat remover. Metal-cavity waveguide lasers showed excellent threshold and characteristic temperature working above 120 °C, while dielectric waveguide lasers ceased operation near 80 °C under the same conditions. The thermal analysis of these lasers showed that metal-cavity lasers have approximately 1.5 times higher thermal conductivity compared with those of the dielectric lasers. We believe that the metal-coating of waveguides and the proper selection of metal efficiently remove the heat from the active region and enable stable lasing operation at high temperature.
authors: Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors: A
authors: A
authors: Matsudaira
authors: C-Y
authors: CY
authors: Lu
authors: T
authors: T
authors: O'Brien
authors: S L
authors: SL
authors: Chuang