This page gathers publications on InAs/InP and alloyed InAsP/InP nanowire quantum dots, including excitonic fine structure, excitonic complexes, telecom-relevant atomistic theory, and related nanowire spectroscopy.
This work extends electric-field control of exciton fine structure to alloyed nanowire quantum-dot molecules, where alloy randomness itself becomes part of the physics. It shows that nominally identical structures can exhibit qualitatively different field evolution of excitonic spectra.
Keywords: nanowire quantum dots, quantum dot molecules, fine-structure splitting
Main result: alloy randomness can both generate and reshape fine-structure splitting in nanowire quantum-dot molecules under electric field. Yet selected realizations still allow sub-µeV splitting without losing optical activity.
This work analyzes InAs/InP-related nanowire quantum dots with atomistic many-body theory, emphasizing realistic geometry, alloying, and experimentally relevant optical spectra. It addresses physics specific to nanowire-defined confinement.
Keywords: nanowire quantum dots, InAs/InP
Main result: nanowire quantum dots show excitonic behavior that depends sensitively on atomistic composition, geometry, and coupling. Their optical spectra cannot be reduced to a simple continuum shape model.
This work uses atomistic modeling to explain why highly asymmetric InAs/InP quantum dots can nevertheless exhibit very small fine-structure splitting. It shows that realistic elongation, faceting, and atomistic symmetry can reshape the bright-exciton doublet in ways that differ from simple continuum expectations.
Keywords: InAs/InP, fine-structure splitting
Main result: atomistic symmetry and realistic geometry strongly control excitonic splitting and polarization. In particular, shape elongation of quantum dots can not only decrease, but even reverse, the splitting of the two lowest optically active excitonic states.
This work shows how electric field can be used to tune excitonic fine-structure splitting in coupled InAs/InP nanowire quantum dots. It identifies a regime where bright-exciton splitting can be reduced without simultaneously suppressing optical activity.
Keywords: nanowire quantum dots, InAs/InP, quantum dot molecules
Main result: strong interdot coupling enables electric-field tuning of bright-exciton splitting down to zero while preserving useful optical strength. This makes nanowire quantum-dot molecules attractive for entangled-photon applications.
This publication contributes to atomistic theory of semiconductor nanostructures and their electronic or optical properties. It emphasizes realistic material, structural, or many-body effects beyond simplified textbook models.
Keywords: InAs/InP
Main result: realistic atomistic modeling is necessary to capture key electronic or optical features of these nanostructures.
This work analyzes how alloy randomness modifies both dark and bright excitons in nanowire quantum dots. It highlights that nominally weak atomistic disorder can strongly affect fine details of excitonic spectra and polarization properties.
Keywords: nanowire quantum dots
Main result: alloy randomness has a pronounced impact on the energies and optical signatures of both bright and dark excitons in nanowire quantum dots. Realistic alloy modeling is therefore essential for quantitative spectroscopy.
This work develops an atomistic description of excitonic fine structure in coupled InAs/InP nanowire quantum dots. It shows how interdot coupling and realistic atomistic asymmetry together govern the bright-exciton doublet and polarization response.
Keywords: nanowire quantum dots, InAs/InP, quantum dot molecules, fine-structure splitting
Main result: excitonic fine structure in nanowire quantum-dot molecules is controlled jointly by coupling and atomistic symmetry breaking. A simple single-dot picture is insufficient once realistic molecular coupling is present.
This work analyzes the fine structure of light-hole excitons in nanowire quantum dots, going beyond the standard heavy-hole picture. It clarifies how confinement geometry can qualitatively alter polarization properties and the ordering of low-energy excitonic states.
Keywords: nanowire quantum dots, fine-structure splitting, light-hole excitons
Main result: sufficiently tall nanowire quantum dots can host a light-hole excitonic ground state with optical signatures distinct from conventional heavy-hole dots. The resulting fine structure is highly sensitive to realistic atomistic confinement.
This publication contributes to atomistic theory of semiconductor nanostructures and their electronic or optical properties. It emphasizes realistic material, structural, or many-body effects beyond simplified textbook models.
Keywords: nanowire quantum dots
Main result: realistic atomistic modeling is necessary to capture key electronic or optical features of these nanostructures.
This work analyzes excitonic fine structure and related optical anisotropies with atomistic many-body theory. It focuses on how realistic geometry, composition, and symmetry breaking determine the low-energy excitonic manifold.
Keywords: nanowire quantum dots, InAs/InP, fine-structure splitting
Main result: fine details of excitonic splitting and polarization are controlled by atomistic symmetry, realistic shape, and material inhomogeneity. Simplified continuum expectations are often insufficient at the µeV scale.