@article{501c4105abed44d597eec39ab7ff28ca,
title = "Room-temperature continuous-wave quantum cascade lasers grown by MOCVD without lateral regrowth",
abstract = "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.",
keywords = "Continuous-wave (CW) lasers, Midinfrared, Quantum cascade (QC) lasers, Semiconductor lasers",
author = "Zhijun Liu and Daniel Wasserman and Howard, \{Scott S.\} and Hoffman, \{Anthony J.\} and Gmachl, \{Claire F.\} and Xiaojun Wang and Tawee Tanbun-Ek and Liwei Cheng and Choa, \{Fow Sen\}",
note = "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.",
year = "2006",
month = jun,
day = "15",
doi = "10.1109/LPT.2006.877006",
language = "English (US)",
volume = "18",
pages = "1347--1349",
journal = "IEEE Photonics Technology Letters",
issn = "1041-1135",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "12",
}