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Novel Design of Current Driven Photonic Crystal Laser Diode

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4 Author(s)
Morifuji, Masato ; Dept. of Quantum Electron. Device Eng., Osaka Univ., Suita ; Nakaya, Y. ; Mitamura, T. ; Kondow, M.

Contrary to the great possibilities of photonic crystal (PC), a practical laser diode with a PC cavity has not yet been developed. This is mainly due to the lack of electrically driven devices; Since a two-dimensional PC slab cladded by air is often employed to realize strong light confinement, it is difficult to inject carriers into a cavity in such an air-bridge structure. An electrically driven laser using a tiny semiconductor pillar for current injection has been reported; however, a large cross-section of the pillar (or low electrical resistance) trades-off a large Q-factor sufficient for lasing. In this letter, we propose a novel design of PC laser diode in which light confinement and carrier injection are highly compatible.

Published in:

Photonics Technology Letters, IEEE  (Volume:21 ,  Issue: 8 )