Photonic band-edge micro lasers with quantum dot gain.
We demonstrate optically pumped continuous-wave photonic band-edge microlasers on a two-dimensional photonic crystal slab. Lasing was observed at a photonic band-edge, where the group velocity was significantly small near the K point of the band structure having a triangular lattice. Lasing was achieved by using a quantum dot gain material, which resulted in a significant decrease in the laser threshold, compared with photonic band-edge lasers using quantum well gain material. Extremely low laser thresholds of approximately 80 nW at 6 K was achieved. Lasing was observed in a defect-free photonic crystal as small as approximately 7 microm square.
Nomura
Masahiro
M
Institute for Nano Quantum Information Electronics, Research Center for Advanced Science and Technology, Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan. nomura@iis.u-tokyo.ac.jp
Iwamoto
Satoshi
S
Tandaechanurat
Aniwat
A
Ota
Yasutomo
Y
Kumagai
Naoto
N
Arakawa
Yasuhiko
Y