Polaron resonances in two vertically stacked quantum dots

Abstract

In this work, we present a theoretical study of polaron states in a double quantum dot system. We present realistic calculations which combine 8 band \kp model, configuration interaction approach and collective modes method. We investigate the dependence of polaron energy branches on axial electric field. We show that coupling between carriers and longitudinal optical phonons via Fröhlich interaction leads to qualitative and quantitative reconstruction of the optical spectra. In particular, we study the structure of resonances between the states localized in different dots. We show that $p$-shell states are strongly coupled to the phonon replicas of $s$-shell states, in contrast to the weak direct $s$-$p$ coupling. We discuss also the dependence of the phonon-assisted tunnel coupling strength on the separation between the dots.

7 pages, 5 figures

References in corpus (6)

• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Origin of non-linear piezoelectricity in III-V semiconductors: Internal strain and bond ionicity from hybrid-functional density functional theory
• Atomistic theory of dark excitons in self-assembled quantum dots of reduced symmetry
• Phonon-assisted relaxation and tunneling in self-assembled quantum dot molecules
• Coulomb mediated hybridization of excitons in artificial molecules
• Picosecond control of quantum dot laser emission by coherent phonons

Cited by in corpus (3)

• Accurate and efficient description of interacting carriers in quantum nanostructures by selected configuration interaction and perturbation theory
• The magneto-optics in quantum wires comprised of vertically stacked quantum dots: A calling for the magnetoplasmon qubits
• Single-particle and collective excitations in quantum wires comprised of vertically stacked quantum dots: Finite magnetic field