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- W3193757750 abstract "Intersubband polaritons are light-matter excitations originating from the strong coupling between an intersubband quantum well electronic transition and a microcavity photon mode. In the low density limit, textit{i.e.}, when only a tiny fraction of the Fermi sea is excited, these excitations are well described by a quadratic effective bosonic Hamiltonian. However, when the number of excitations in the system increases, deviations from this behavior occur. In this thesis we study how the Coulomb electron-electron interaction and the Pauli saturation of the electronic transitions affect the physics of intersubband polaritons by adapting a commutator technique for composite bosons. We develop a microscopic theory to derive the polariton-polariton interactions and explain how it can be encoded in effective quartic bosonic Hamiltonian. Using realistic set of parameters we predict that polariton-polariton interactions can be signicant, especially in the THz range. This work paves the way to promising future studies in nonlinear optics with intersubband polaritons. The main results of this work are published in Ref. [1]." @default.
- W3193757750 created "2021-08-30" @default.
- W3193757750 creator A5012105446 @default.
- W3193757750 date "2014-02-25" @default.
- W3193757750 modified "2023-09-26" @default.
- W3193757750 title "Polariton-polariton interactions in a cavity-embedded 2D-electron gas" @default.
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