Quantum model of coupled intersubband plasmons
arXiv:1407.3923 · doi:10.1103/PhysRevB.90.035305
Abstract
We present a quantum model to calculate the dipole-dipole coupling between electronic excitations in the conduction band of semiconductor quantum wells. We demonstrate that the coupling depends on a characteristic length, related to the overlap between microscopic current densities associated with each electronic excitation. As a result of the coupling, a macroscopic polarization is established in the quantum wells, corresponding to one or few bright collective modes of the electron gas. Our model is applied to derive a sum rule and to investigate the interplay between tunnel coupling and Coulomb interaction in the absorption spectrum of a dense electron gas.
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Cited by in corpus (8)
- Layer-Resolved Absorption of Light in Arbitrarily Anisotropic Heterostructures
- Strong and ultra-strong coupling with free space radiation
- Semiconductor quantum plasmonics
- Output squeezed radiation from dispersive ultrastrong light-matter coupling
- Coulomb-induced synchronization of intersubband coherences in highly doped quantum wells and the formation of giant collective resonances
- Phonon-mediated dark to bright plasmon conversion
- Magnetic dipole absorption of light at intersubband transitions in quantum wells
- Radiatively broadened thermal emitters