Premium
Green's Function Calculation of Electro‐Optical Effects in Semiconductors. I. General Formalism and Interband Transitions
Author(s) -
Porsch M.
Publication year - 1968
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/pssb.19680270137
Subject(s) - physics , dielectric function , electric field , point reflection , condensed matter physics , electron , quantum mechanics , formalism (music) , dielectric , non equilibrium thermodynamics , semiconductor , quantum electrodynamics , lattice (music) , art , musical , visual arts , acoustics
A general expression for the dielectric tensor induced by a light wave in the presence of a time‐dependent external electric field is given in terms of double‐time nonequilibrium Green's functions whose spectral representations are derived in the case of a static field. Neglecting field‐induced interband transitions, the poles of the one and two‐particle Green's functions for a Bloch electron in a static electric field are determined. The imaginary part of the dielectric function at the M 0 edge is calculated for a lattice with no centres of inversion symmetry.