This page gathers publications on coupled quantum dots and quantum dot molecules, with emphasis on atomistic studies of bonding and antibonding states, hole-state coupling, tunneling, and level reordering.
This work shows that crystal-phase InP quantum dots can exhibit an unusual antibonding hole ground state, despite being defined within a single chemical material. It links this nonintuitive level ordering to the combined role of crystal-phase interfaces and weak strain neglected in simplified models.
Keywords: crystal-phase quantum dots
Main result: crystal-phase InP quantum dots may host an antibonding hole ground state, leaving a clear fingerprint in the excitonic spectrum. Even weak zinc-blende/wurtzite strain can qualitatively reshape the lowest hole states.
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 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 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 self-assembled quantum dots with atomistic theory, emphasizing strain, band mixing, and realistic many-body spectra. It addresses effects that are difficult to capture within simplified continuum descriptions.
Keywords: self-assembled quantum dots
Main result: quantitative agreement for self-assembled quantum-dot spectra requires realistic strain and atomistic band-structure treatment. Small structural details can qualitatively influence the low-energy states.
This work studies coupled quantum dots with atomistic theory, emphasizing how tunneling, strain, and valence-band complexity reshape the molecular-like spectrum. It goes beyond simple bonding–antibonding intuition whenever realistic hole physics becomes important.
Keywords: quantum dot molecules
Main result: realistic coupling in quantum-dot molecules can reorder levels and qualitatively modify the nature of the lowest hole and excitonic states. Atomistic details are essential to correctly identify bonding versus antibonding behavior.
This work studies coupled quantum dots with atomistic theory, emphasizing how tunneling, strain, and valence-band complexity reshape the molecular-like spectrum. It goes beyond simple bonding–antibonding intuition whenever realistic hole physics becomes important.
Keywords: atomistic theory, quantum dots
Main result: realistic coupling in quantum-dot molecules can reorder levels and qualitatively modify the nature of the lowest hole and excitonic states. Atomistic details are essential to correctly identify bonding versus antibonding behavior.
This work studies coupled quantum dots with atomistic theory, emphasizing how tunneling, strain, and valence-band complexity reshape the molecular-like spectrum. It goes beyond simple bonding–antibonding intuition whenever realistic hole physics becomes important.
Keywords: quantum dot molecules
Main result: realistic coupling in quantum-dot molecules can reorder levels and qualitatively modify the nature of the lowest hole and excitonic states. Atomistic details are essential to correctly identify bonding versus antibonding behavior.
This work studies coupled quantum dots with atomistic theory, emphasizing how tunneling, strain, and valence-band complexity reshape the molecular-like spectrum. It goes beyond simple bonding–antibonding intuition whenever realistic hole physics becomes important.
Keywords: quantum dot molecules
Main result: realistic coupling in quantum-dot molecules can reorder levels and qualitatively modify the nature of the lowest hole and excitonic states. Atomistic details are essential to correctly identify bonding versus antibonding behavior.
This work studies coupled quantum dots with atomistic theory, emphasizing how tunneling, strain, and valence-band complexity reshape the molecular-like spectrum. It goes beyond simple bonding–antibonding intuition whenever realistic hole physics becomes important.
Keywords: quantum dot molecules
Main result: realistic coupling in quantum-dot molecules can reorder levels and qualitatively modify the nature of the lowest hole and excitonic states. Atomistic details are essential to correctly identify bonding versus antibonding behavior.