Title :
Quantum Cascade Microlasers With Two-Dimensional Photonic Crystal Reflectors
Author :
Heinrich, Jan ; Langhans, Rainer ; Seufert, Jochen ; Höfling, Sven ; Forchel, Alfred
Author_Institution :
Univ. Wurzburg, Wurzburg
Abstract :
Edge-emitting GaAs-Al0.45Ga0.55As quantum cascade microlasers with photonic crystal reflectors have been fabricated. The resonator length of 100 mum leads to a large free-pectral range of the longitudinal resonator modes. Owing to this large free-spectral range, single-mode operation with a sidemode suppression ratio of 20 dB at 80 K has been achieved. Stable single-mode emission is obtained and the emission can be tuned with a rate of -0.046 cm-1/K. The maximum operation temperature of this microlaser is 220 K, whereas a 275-mum-long device can be operated up to 280 K.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; microcavity lasers; quantum cascade lasers; GaAs-Al0.45Ga0.55As; edge-emitting quantum cascade microlasers; photonic crystal reflectors; quantum cascade microlasers; resonator length; single-mode operation; temperature 80 K; two-dimensional photonic crystal reflectors; Crystalline materials; Etching; Laser modes; Mirrors; Optical device fabrication; Optical materials; Photonic crystals; Quantum cascade lasers; Scanning electron microscopy; Surface emitting lasers; Microlasers; mid-infrared; photonic crystal (PhC); quantum cascade lasers (QCLs); single-mode;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.908774
