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Interface Plasmon Modes as Collective Electronic Excitations of Semiconductor Superlattices
Author(s) -
Bechstedt F.,
Enderlein R.
Publication year - 1986
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.2221370114
Subject(s) - superlattice , plasmon , interface (matter) , condensed matter physics , quasiparticle , dispersion (optics) , semiconductor , dispersion relation , surface plasmon , limiting , spatial dispersion , physics , materials science , optoelectronics , optics , quantum mechanics , molecule , mechanical engineering , gibbs isotherm , superconductivity , engineering
The frequency spectrum of polar interface modes of superlattices is derived with regard of bulk spatial dispersion. The results are applied to free carrier excitations of superlattices. Dispersion relations are given for intra‐ and intersubband interface plasmon modes. It is shown that collective electronic excitations of superlattices considered in previous papers are limiting cases of interface plasmon modes. Experimental data on plasmon dispersion can be understood in terms of interface plasmon modes if carrier confinement is taken into account.