@article { ISI:000318765500012,
	title = {Limiting Factors to the Temperature Performance of THz Quantum Cascade Lasers Based on the Resonant-Phonon Depopulation Scheme},
	journal = {IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY},
	volume = {2},
	number = {1},
	year = {2012},
	month = {JAN},
	pages = {83-92},
	publisher = {IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC},
	type = {Article},
	address = {445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA},
	abstract = {We analyze the temperature performance of five terahertz (THz)-frequency quantum cascade lasers based on a three-quantum-well resonant-phonon depopulation design as a function of operating frequency in the 2.3-3.8-THz range. We find evidence that the device performance is limited by the interplay between two factors: 1) optical phonon scattering of thermal electrons, which dominates at shorter wavelengths, and 2) parasitic current, which dominates at longer wavelengths. We present a simple model that provides an accurate estimate of the parasitic current in these devices and predicts the dependence of the threshold current density on temperature.},
	keywords = {Quantum cascade lasers (QCLs), semiconductor lasers, terahertz (THz)},
	issn = {2156-342X},
	doi = {10.1109/TTHZ.2011.2177176},
	author = {Chassagneux, Y. and Wang, Q. J. and Khanna, S. P. and Strupiechonski, E. and Coudevylle, J. -R. and Linfield, E. H. and A.G. Davies and F. Capasso and Belkin, M. A. and Colombelli, R.}
}
