TY - JOUR
T1 - Quantum cascade lasers with double-quantum-well superlattices
AU - Wanke, Michael C.
AU - Capasso, Federico
AU - Gmachl, Claire
AU - Tredicucci, Alessandro
AU - Sivco, Deborah L.
AU - Hutchinson, Albert L.
AU - Cho, Alfred Y.
N1 - Funding Information:
Manuscript received August 7, 2000; revised December 11, 2000. This work was supported in part by the Defense Advanced Research Projects Agency/U.S. Army Research Office under Contract DAAD19-00-C-0096. M. C. Wanke was with the Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. He is now with Sandia National Labs, Albuquerque, NM 87185 USA (e-mail: [email protected]). F. Capasso, C. Gmachl, D. L. Sivco, and A. Y. Cho are with the Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. A. Tredicucci was with the Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. He is now with Scuola Normale Superiore and INFM, Pisa, Italy. A. L. Hutchinson, retired, was with the Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974 USA. Publisher Item Identifier S 1041-1135(01)03101-9.
PY - 2001/4
Y1 - 2001/4
N2 - A quantum-cascade laser using a double-quantum-well graded superlattice as the active region is presented. Each SL period consists of two strongly coupled quantum wells resulting in the splitting of the lowest miniband into two minibands. These two minibands can be designed to be flat and to contain delocalized, spatially symmetric wavefunctions under an applied electric field which in turn leads to a high optical dipole for the interminiband transition. In addition, the new design allows independent control of the energy levels of the lowest two minibands, their width and the splitting separating them, enhancing design flexibility. Using a cascade design of 55 pairs of alternated active regions and injectors, pulsed laser action is achieved at λ = 11.6 μm. Peak output powers reach 120 mW at 7 K and approximately 12 mW at the maximum operating temperature of 195 K.
AB - A quantum-cascade laser using a double-quantum-well graded superlattice as the active region is presented. Each SL period consists of two strongly coupled quantum wells resulting in the splitting of the lowest miniband into two minibands. These two minibands can be designed to be flat and to contain delocalized, spatially symmetric wavefunctions under an applied electric field which in turn leads to a high optical dipole for the interminiband transition. In addition, the new design allows independent control of the energy levels of the lowest two minibands, their width and the splitting separating them, enhancing design flexibility. Using a cascade design of 55 pairs of alternated active regions and injectors, pulsed laser action is achieved at λ = 11.6 μm. Peak output powers reach 120 mW at 7 K and approximately 12 mW at the maximum operating temperature of 195 K.
KW - Intersubband
KW - Mid-infrared
KW - Semiconductor injection laser
KW - Semiconductor superlattices
KW - Unipolar laser
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U2 - 10.1109/68.917824
DO - 10.1109/68.917824
M3 - Article
AN - SCOPUS:0035303578
SN - 1041-1135
VL - 13
SP - 278
EP - 280
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 4
ER -