TY - JOUR
T1 - Room-temperature continuous-wave quantum cascade lasers grown by MOCVD without lateral regrowth
AU - Liu, Zhijun
AU - Wasserman, Daniel
AU - Howard, Scott S.
AU - Hoffman, Anthony J.
AU - Gmachl, Claire F.
AU - Wang, Xiaojun
AU - Tanbun-Ek, Tawee
AU - Cheng, Liwei
AU - Choa, Fow Sen
N1 - Funding Information:
Manuscript received February 22, 2006; revised April 7, 2006. This work was supported in part by the Defense Advanced Research Projects Agency (DARPA) L-PAS. Z. Liu, D. Wasserman, S. S. Howard, A. J. Hoffman, and C. F. Gmachl are with the Department of Electrical Engineering and the Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, NJ 08544 USA (e-mail: [email protected]). X. Wang and T. Tanbun-Ek are with AdTech Optics, City of Industry, CA 91748 USA. L. Cheng and F.-S. Choa are with the Department of Computer Science and Electrical Engineering, University of Maryland, Baltimore, MD 21250 USA. Digital Object Identifier 10.1109/LPT.2006.877006 Fig. 1. (a) Portion of the conduction band diagram and the moduli squared of the relevant wave functions of a 8.2-m QC laser with a four quantum-well active region based on a two phonon resonance. An electric field of 51 kV/cm is applied. The arrow indicates the laser transition. (b) Intensity profile of the fundamental mode, layer structure, and profile of the real part of the refractive index of the dielectric waveguide used.
PY - 2006/6/15
Y1 - 2006/6/15
N2 - We report on room-temperature continuous-wave (CW) operation of λ ∼ 8.2 μm quantum cascade lasers grown by metal-organic chemical vapor deposition without lateral re-growth. 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.
AB - We report on room-temperature continuous-wave (CW) operation of λ ∼ 8.2 μm quantum cascade lasers grown by metal-organic chemical vapor deposition without lateral re-growth. 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.
KW - Continuous-wave (CW) lasers
KW - Midinfrared
KW - Quantum cascade (QC) lasers
KW - Semiconductor lasers
UR - http://www.scopus.com/inward/record.url?scp=33745154803&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33745154803&partnerID=8YFLogxK
U2 - 10.1109/LPT.2006.877006
DO - 10.1109/LPT.2006.877006
M3 - Article
AN - SCOPUS:33745154803
SN - 1041-1135
VL - 18
SP - 1347
EP - 1349
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 12
ER -