@inproceedings{383bdea1250541599d05aaaf1fcc95cb,
title = "Non-cascaded intersubband injection lasers and scaling with the number of stages in quantum cascade lasers",
author = "Claire Gmachl and Federico Capasso and Alessandro Tredicucci and Sivco, \{Deborah L.\} and Hutchinson, \{Albert L.\} and Cho, \{Alfred Y.\}",
note = "Funding Information: Furthermore, as partly presented in Figure 3, we studied the QC-laser behavior as a function of the number N of stacked active regions (for the design see Figure 1 and reference 2), both experimentally (for N = U3.6,12,20,30, 45, 60, and 75) and theoretically. We determine the optimum value of N in various aspects: the highest optical power and lowest threshold current density are obtained for laser devices with N as high as possible. QC-lasers with 75 stages showed pulsed peak powers of 1.4-W, 1.1 -W and 0.54-W at 50-K, 200-K, and room temperature, respectively. The lowest threshold voltage (1.5-V) and the lowest dissipated power at laser threshold (6.3-kW cm{"}2) are achieved at values of N = 3 and 22, respectively. This material is based upon work supported in part by DARPA/US Army Research Office under Contract No. DAAH04-96-C-0026 and DAAG55-98-C-0O50. 1. F. Capasso, I. Faist, C. Sirtori, and A.Y. Cho, Solid State Commun. 102,231 (1997). 2. C. Gmachl, A. Tredicucci, F. Capasso, A.L. Hutchinson, D.L. Sivco, J.N. Baillargeon, and A.Y. Cho, Appl. Phys. Lett. 72, 3130 (1998). 3. J. Faist, A. Tredicucci, F. Capasso, C. Sirtori, D.L. Sivco, J.N. Baillargeon, A.L. Hutchin-son, and A.Y. Cho, {"}High-Power Continuous-Wave Quantum Cascade La-ser,{"} IEEE ). Quantum Electron. 34, pp. 336-343, 1998.; Quantum Electronics and Laser Science Conference, QELS 1999 ; Conference date: 23-05-1999 Through 26-05-1999",
year = "1999",
language = "English (US)",
series = "Optics InfoBase Conference Papers",
publisher = "Optica Publishing Group (formerly OSA)",
booktitle = "Quantum Electronics and Laser Science Conference, QELS 1999",
}