25 January 2012 Collective plasmon-phonon modes in realistic EuS/PbS/EuS semiconductor quantum well
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Proceedings Volume 8414, Photonics and Micro- and Nano-structured Materials 2011; 84140I (2012) https://doi.org/10.1117/12.923210
Event: Photonics and Micro- and Nano- structured Materials 2011, 2011, Yerevan, Armenia
Abstract
In the realistic EuS/PbS/EuS quantum well system with strong material parameter contrasts in heteroboundaries (MPCH) a collective plasmon-phonon excitation spectrum for a weakly polar quasi-two-dimensional electron gas interacting with the longitudinal optical phonons is investigated. The calculations are carried out within the framework of the random-phase approximation by use of exactly calculated dielectric function of an electron gas. The analytical and numerical deviations from the results when MPCH is absent are established. The mode coupling due to MPCH for typical moderate low in-plane densities ( 3.5.1011 cm-2 ) is presented. It is shown, that in this realistic structure a low plasmon-like coupled mode is deeply suppressed and high phonon-like mode weakly depends from the transverse optical frequency due to the lead salt material features.
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K. H. Aharonyan, K. H. Aharonyan, "Collective plasmon-phonon modes in realistic EuS/PbS/EuS semiconductor quantum well", Proc. SPIE 8414, Photonics and Micro- and Nano-structured Materials 2011, 84140I (25 January 2012); doi: 10.1117/12.923210; https://doi.org/10.1117/12.923210
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