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Title: Tuning and Switching a Plasmonic Quantum Dot “Sandwich” in a Nematic Line Defect

Abstract

We study the quantum-mechanical effects arising in a single semiconductor core/shell quantum dot (QD) controllably sandwiched between two plasmonic nanorods. Control over the position and the 'sandwich' confinement structure is achieved by the use of a linear-trap liquid crystal (LC) line defect and laser tweezers that 'push' the sandwich together. This arrangement allows for the study of exciton-plasmon interactions in a single structure, unaltered by ensemble effects or the complexity of dielectric interfaces. We demonstrate the effect of plasmonic confinement on the photon antibunching behavior of the QD and its luminescence lifetime. The QD behaves as a single emitter when nanorods are far away from the QD but shows possible multiexciton emission and a significantly decreased lifetime when tightly confined in a plasmonic 'sandwich'. These findings demonstrate that LC defects, combined with laser tweezers, enable a versatile platform to study plasmonic coupling phenomena in a nanoscale laboratory, where all elements can be arranged almost at will.

Authors:
ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Univ. of Colorado, Boulder, CO (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1427346
Report Number(s):
NREL/JA-5900-68952
Journal ID: ISSN 1936-0851
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 12; Journal Issue: 3; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; antibunching; disclination; liquid crystals; metal nanoparticles; plasmonics; semiconductor nanocrystals

Citation Formats

Mundoor, Haridas, Sheetah, Ghadah H., Park, Sungoh, Ackerman, Paul J., Smalyukh, Ivan I., and van de Lagemaat, Jao. Tuning and Switching a Plasmonic Quantum Dot “Sandwich” in a Nematic Line Defect. United States: N. p., 2018. Web. doi:10.1021/acsnano.7b08462.
Mundoor, Haridas, Sheetah, Ghadah H., Park, Sungoh, Ackerman, Paul J., Smalyukh, Ivan I., & van de Lagemaat, Jao. Tuning and Switching a Plasmonic Quantum Dot “Sandwich” in a Nematic Line Defect. United States. doi:10.1021/acsnano.7b08462.
Mundoor, Haridas, Sheetah, Ghadah H., Park, Sungoh, Ackerman, Paul J., Smalyukh, Ivan I., and van de Lagemaat, Jao. Wed . "Tuning and Switching a Plasmonic Quantum Dot “Sandwich” in a Nematic Line Defect". United States. doi:10.1021/acsnano.7b08462.
@article{osti_1427346,
title = {Tuning and Switching a Plasmonic Quantum Dot “Sandwich” in a Nematic Line Defect},
author = {Mundoor, Haridas and Sheetah, Ghadah H. and Park, Sungoh and Ackerman, Paul J. and Smalyukh, Ivan I. and van de Lagemaat, Jao},
abstractNote = {We study the quantum-mechanical effects arising in a single semiconductor core/shell quantum dot (QD) controllably sandwiched between two plasmonic nanorods. Control over the position and the 'sandwich' confinement structure is achieved by the use of a linear-trap liquid crystal (LC) line defect and laser tweezers that 'push' the sandwich together. This arrangement allows for the study of exciton-plasmon interactions in a single structure, unaltered by ensemble effects or the complexity of dielectric interfaces. We demonstrate the effect of plasmonic confinement on the photon antibunching behavior of the QD and its luminescence lifetime. The QD behaves as a single emitter when nanorods are far away from the QD but shows possible multiexciton emission and a significantly decreased lifetime when tightly confined in a plasmonic 'sandwich'. These findings demonstrate that LC defects, combined with laser tweezers, enable a versatile platform to study plasmonic coupling phenomena in a nanoscale laboratory, where all elements can be arranged almost at will.},
doi = {10.1021/acsnano.7b08462},
journal = {ACS Nano},
number = 3,
volume = 12,
place = {United States},
year = {Wed Feb 28 00:00:00 EST 2018},
month = {Wed Feb 28 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
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