Title :
LO phonon scattering as a depopulation mechanism in Si/SiGe quantum cascades
Author :
Townsend, P. ; Paul, D.J. ; Lynch, S.A. ; Kelsall, R.W. ; Ikonic, Z. ; Harrison, P. ; Norris, D.J. ; Cullis, A.G. ; Zhang, J. ; Li, X. ; Pidgeon, C.R. ; Murdin, B.N. ; Murzyn, P.
Author_Institution :
Cavendish Lab., Cambridge Univ., UK
Abstract :
The linear optical phonon as a fast depopulation mechanism in Si/SiGe quantum cascade devices. Confirmed by pump-probe, the lifetime measurement is limited by the optical cycle of the source (<2 ps). Fourier transform spectroscopy shows intersubband electroluminescence with good agreement to theory.
Keywords :
Fourier transform spectra; Ge-Si alloys; electroluminescence; elemental semiconductors; phonons; quantum cascade lasers; silicon; Fourier transform spectroscopy; LO phonon scattering; Si-SiGe; Si-SiGe quantum cascades; depopulation mechanism; intersubband electroluminescence; lifetime measurement; linear optical phonon; pump-probe measurement; quantum cascade devices; Fourier transforms; Germanium silicon alloys; Lifetime estimation; Optical devices; Optical pumping; Optical scattering; Particle scattering; Phonons; Silicon germanium; Spectroscopy;
Conference_Titel :
Group IV Photonics, 2005. 2nd IEEE International Conference on
Print_ISBN :
0-7803-9070-9
DOI :
10.1109/GROUP4.2005.1516384
