Zero-Phonon Line Broadening and Satellite Peaks in Nanowire Quantum Dots: The Role of Piezoelectric Coupling

Abstract

We investigate the influence of the one-dimensional character of the phonon modes in a catalytically grown GaAs nanowire on the absorption spectrum of an embedded quantum dot, focusing on the contribution from the piezoelectric coupling. In general, the reduced dimensionality of the phonons leads to spectral side peaks and a zero-phonon line broadening due to the energetically lowest (acoustic) phonon mode. While the deformation potential predominantly couples to radial modes, the piezoelectric interaction can also couple strongly to modes of axial character, leading to additional absorption features. The contribution of the piezoelectric coupling to the zero-phonon line is negligible.

arXiv comment4 pages, 5 figures, to appear in Physica Status Solidi B (simulation parameters and figures changed, minor changes in text)

References in corpus (4)

• Phonon-induced Exciton Dephasing in Quantum Dot Molecules
• LO Phonon-Induced Exciton Dephasing in Quantum Dots: An Exactly Solvable Model
• Change of decoherence scenario and appearance of localization due to reservoir anharmonicity
• Zero-phonon linewidth and phonon satellites in the optical absorption of nanowire-based quantum dots

Cited by in corpus (5)

• Phonon-Assisted Gain in a Semiconductor Double Quantum Dot Maser
• Probing confined phonon modes by transport through a nanowire double quantum dot
• Microwave detection of electron-phonon interactions in a cavity-coupled double quantum dot
• Electric manipulation of electron spin relaxation induced by confined phonons in nanowire-based double quantum dots
• Singlet-triplet relaxation induced by confined phonons in nanowire-based quantum dots