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Level Broadening Effects in Hot Luminescence from a Quantum Wire
Author(s) -
Rokni M.,
Levinson Y.
Publication year - 1997
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(199711)204:1<326::aid-pssb326>3.0.co;2-z
Subject(s) - luminescence , excited state , quantum wire , quantum , physics , electron , laser , generalization , atomic physics , phonon , quantum mechanics , condensed matter physics , optoelectronics , mathematics , mathematical analysis
We consider hot luminescence from a quantum wire (QWR) due to electrons that are excited by a narrow band, noncoherent cw laser, to the close vicinity of the threshold for optical LO phonon emission. In this case one has to resort to quantum kinetic equations (QKEs), since the level broadening close to the threshold is large, due to the singular 1D density of states. The QKEs are formulated using a recipe that we derived for the generalization of the Boltzmann equation (BE). The luminescence spectral distribution is calculated using these QKEs. It is shown that the scale that determines the quantum behavior of the system differs from what one would expect from simple level broadening considerations.