Photonic microstructures as laser mirrors

Thomas Fraser Krauss, O Painter, A Scherer, JS Roberts, RM De La Rue

Research output: Other contribution

58 Citations (Scopus)

Abstract

Deeply etched 1-D third-order Bragg reflectors have been used as mirrors for broad-area semiconductor lasers operating at 975-nm wavelength. From a threshold and efficiency analysis, we determine the mirror reflectivity to be approximately 95%. The design of the GaAs-based laser structure features three [nGaAs quantum wells placed close (0.5 mu m) to the surface in order to reduce the required etch depth and facilitate high-quality etching. Despite the shallow design and the proximity of the guided mode to the metal contact, the threshold current density (J(th)=220 A/cm(2) for infinite cavity length) and internal loss(alpha(i)=9+/-1 cm(-1)) are very low. (C) 1998 Society of Photo-Optical Instrumentation Engineers.

Original languageEnglish
Volume37
Publication statusPublished - Apr 1998

Keywords

  • photonic microstructures
  • semiconductor lasers
  • Bragg mirrors
  • photonic bandgap
  • low threshold
  • QUANTUM-WELL LASERS

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