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Title: Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry

Abstract

Semiconductor quantum rings are topological structures that support fascinating phenomena such as the Aharonov-Bohm effect and persistent current, which are of high relevance in the research of quantum information devices. The annular shape of quantum rings distinguishes them from other low-dimensional materials, and enables topologically induced properties such as geometry-dependent spin manipulation and emission. While optical transition dipole moments (TDMs) in zero to two-dimensional optical emitters have been well investigated, those in quantum rings remain obscure despite their utmost relevance to the quantum photonic applications of quantum rings. Here, we study the dimensionality and orientation of TDMs in CdSe quantum rings. In contrast to those in other two-dimensional optical emitters, we find that TDMs in CdSe quantum rings show a peculiar in-plane linear distribution. Our theoretical modeling reveals that this uniaxial TDM originates from broken rotational symmetry in the quantum ring geometries.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [5];  [5];  [6];  [2];  [1];  [2]
  1. LMU Munich, Munich (Germany). Dept. of Chemistry and Center for NanoScience (CeNS)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  3. Univ. of Chicago, Chicago, IL (United States). Dept. of Chemistry and James Franck Inst.
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials; Univ. of Chicago, Chicago, IL (United States). Dept. of Chemistry and James Franck Inst.
  5. Univ. of Ottawa, Ottawa, ON (Canada). Dept. of Physics
  6. National Research Council, Ottawa (Canada). Quantum Theory Group, Security and Disruptive Technologies
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Quantum Information Science (QIS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; German Research Foundation (DFG)
OSTI Identifier:
1574130
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Quantum Information Science (QIS); quantum optics; nanoscale materials

Citation Formats

Hartmann, Nicolai F., Otten, Matthew, Fedin, Igor, Talapin, Dmitri, Cygorek, Moritz, Hawrylak, Pawel, Korkusinski, Marek, Gray, Stephen, Hartschuh, Achim, and Ma, Xuedan. Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry. United States: N. p., 2019. Web. doi:10.1038/s41467-019-11225-6.
Hartmann, Nicolai F., Otten, Matthew, Fedin, Igor, Talapin, Dmitri, Cygorek, Moritz, Hawrylak, Pawel, Korkusinski, Marek, Gray, Stephen, Hartschuh, Achim, & Ma, Xuedan. Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry. United States. doi:10.1038/s41467-019-11225-6.
Hartmann, Nicolai F., Otten, Matthew, Fedin, Igor, Talapin, Dmitri, Cygorek, Moritz, Hawrylak, Pawel, Korkusinski, Marek, Gray, Stephen, Hartschuh, Achim, and Ma, Xuedan. Mon . "Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry". United States. doi:10.1038/s41467-019-11225-6. https://www.osti.gov/servlets/purl/1574130.
@article{osti_1574130,
title = {Uniaxial transition dipole moments in semiconductor quantum rings caused by broken rotational symmetry},
author = {Hartmann, Nicolai F. and Otten, Matthew and Fedin, Igor and Talapin, Dmitri and Cygorek, Moritz and Hawrylak, Pawel and Korkusinski, Marek and Gray, Stephen and Hartschuh, Achim and Ma, Xuedan},
abstractNote = {Semiconductor quantum rings are topological structures that support fascinating phenomena such as the Aharonov-Bohm effect and persistent current, which are of high relevance in the research of quantum information devices. The annular shape of quantum rings distinguishes them from other low-dimensional materials, and enables topologically induced properties such as geometry-dependent spin manipulation and emission. While optical transition dipole moments (TDMs) in zero to two-dimensional optical emitters have been well investigated, those in quantum rings remain obscure despite their utmost relevance to the quantum photonic applications of quantum rings. Here, we study the dimensionality and orientation of TDMs in CdSe quantum rings. In contrast to those in other two-dimensional optical emitters, we find that TDMs in CdSe quantum rings show a peculiar in-plane linear distribution. Our theoretical modeling reveals that this uniaxial TDM originates from broken rotational symmetry in the quantum ring geometries.},
doi = {10.1038/s41467-019-11225-6},
journal = {Nature Communications},
number = 1,
volume = 10,
place = {United States},
year = {2019},
month = {7}
}

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