@article { ISI:000176869100175,
	title = {FIR quantum cascade lasers at lambda > 20 pm and THz emitters at lambda=80 mu m},
	journal = {PHYSICA E-LOW-DIMENSIONAL SYSTEMS \& NANOSTRUCTURES},
	volume = {13},
	number = {2-4},
	year = {2002},
	note = {10th International Conference on Modulated Semiconductor Structures, LINZ, AUSTRIA, JUL 23-27, 2001},
	month = {MAR},
	pages = {848-853},
	publisher = {ELSEVIER SCIENCE BV},
	type = {Article; Proceedings Paper},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {Quantum cascade lasers operating at lambda > 20 mum wavelength are reported. Pulsed operation as obtained up to 140 K with a peak power of few milliwatts at cryogenic temperatures, Laser action originates from interminiband transitions in {\textquoteleft}{\textquoteleft}chirped{\textquoteright}{\textquoteright} superlattice active regions. The waveguides are based on surface-plasmon modes confined at a metal semiconductor interface, but we also report on a 21.5 mum wavelength laser based on a double-sided interface-plasmon waveguide. This latter, contrary to the single-sided surface plasmon, is a viable waveguiding solution in the THz range, i.e. at wavelengths between 60 and 100 mum. Finally, intersubband electroluminescence is reported in a quantum cascade structure based on asymmetric superlattice active regions and designed for emission in the THz range at lambda approximate to 80 mum. (C) 2002 Published by Elsevier Science B.V.},
	keywords = {semiconductor lasers, stimulated emission},
	issn = {1386-9477},
	doi = {10.1016/S1386-9477(02)00218-7},
	author = {Colombelli, R and F. Capasso and Straub, A and C. Gmachl and Blakey, MI and Sergent, AM and Sivco, DL and Cho, AY and West, KW and Pfeiffer, LN}
}
