Quantum design of QC-laser J. Faist, F. Capasso, C. Sirtori, D. L. Sivco, J. N. Baillargeon, A. L. Hutchinson, S. N. G. Chu, and A. Y. Cho, Appl. Phys. Lett. 68, pp. 3680-3682 (1996).
Design of energy levels 3 and 2 to achieve:
- Desired laser frequency ? :?? ? = (E3- E2)/h
- Light amplification: level 3 full of electrons; level 2 empty of electrons