Title :
Room-temperature continuous-wave quantum cascade lasers grown by MOCVD without lateral regrowth
Author :
Zhijun Liu ; Wasserman, D. ; Howard, Scott S. ; Hoffman, Anthony J. ; Gmachl, Claire F. ; Xiaojun Wang ; Tanbun-Ek, T. ; Liwei Cheng ; Fow-Sen Choa
Author_Institution :
Dept. of Electr. Eng., Princeton Univ., NJ
fDate :
6/1/2006 12:00:00 AM
Abstract :
We report on room-temperature continuous-wave (CW) operation of lambda~8.2 mum quantum cascade lasers grown by metal-organic chemical vapor deposition without lateral regrowth. The lasers have been processed as double-channel ridge waveguides with thick electroplated gold. CW output power of 5.3 mW is measured at 300 K with a threshold current density of 2.63 kA/cm2. The measured gain at room temperature is close to the theoretical design, which enables the lasers to overcome the relatively high waveguide loss
Keywords :
MOCVD; current density; infrared sources; laser variables measurement; optical fabrication; quantum cascade lasers; ridge waveguides; semiconductor device measurement; semiconductor growth; 300 K; 5.3 mW; MOCVD; double-channel ridge waveguides; electroplated gold; metal-organic chemical vapor deposition; quantum cascade lasers; threshold current density; Chemical lasers; Chemical vapor deposition; Current measurement; Density measurement; Gold; Laser theory; MOCVD; Power generation; Quantum cascade lasers; Waveguide lasers; Continuous-wave (CW) lasers; midinfrared; quantum cascade (QC) lasers; semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.877006
