Citation:
V Spagnolo, G Scamarcio, M Troccoli, F Capasso, C Gmachl, AM Sergent, AL Hutchinson, DL Sivco, and AY Cho. 2002. “Nonequilibrium optical phonon generation by steady-state electron transport in quantum-cascade lasers.” APPLIED PHYSICS LETTERS, 80, 23, Pp. 4303-4305.