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Title: Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure

Abstract

Emission control of colloidal quantum dots (QDs) is a cornerstone of modern high-quality lighting and display technologies. Dynamic emission control of colloidal QDs in an optoelectronic device is usually achieved by changing the optical pump intensity or injection current density. Here we propose and demonstrate a distinctly different mechanism for the temporal modulation of QD emission intensity at constant optical pumping rate. Our mechanism is based on the electrically controlled modulation of the local density of optical states (LDOS) at the position of the QDs, resulting in the modulation of the QD spontaneous emission rate, far-field emission intensity, and quantum yield. We manipulate the LDOS via field effect-induced optical permittivity modulation of an ultrathin titanium nitride (TiN) film, which is incorporated in a gated TiN/SiO 2/Ag plasmonic heterostructure. In conclusion, the demonstrated electrical control of the colloidal QD emission provides a new approach for modulating intensity of light in displays and other optoelectronics.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2];  [2];  [2];  [2];  [2];  [2]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States); Academia Sinica, Taipei (Taiwan)
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States)
Publication Date:
Research Org.:
California Inst. of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1499680
Grant/Contract Number:  
FG02-07ER46405
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Lu, Yu -Jung, Sokhoyan, Ruzan, Cheng, Wen -Hui, Shirmanesh, Ghazaleh Kafaie, Davoyan, Artur R., Pala, Ragip A., Thyagarajan, Krishnan, and Atwater, Harry A.. Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure. United States: N. p., 2017. Web. doi:10.1038/s41467-017-01870-0.
Lu, Yu -Jung, Sokhoyan, Ruzan, Cheng, Wen -Hui, Shirmanesh, Ghazaleh Kafaie, Davoyan, Artur R., Pala, Ragip A., Thyagarajan, Krishnan, & Atwater, Harry A.. Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure. United States. doi:10.1038/s41467-017-01870-0.
Lu, Yu -Jung, Sokhoyan, Ruzan, Cheng, Wen -Hui, Shirmanesh, Ghazaleh Kafaie, Davoyan, Artur R., Pala, Ragip A., Thyagarajan, Krishnan, and Atwater, Harry A.. Tue . "Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure". United States. doi:10.1038/s41467-017-01870-0. https://www.osti.gov/servlets/purl/1499680.
@article{osti_1499680,
title = {Dynamically controlled Purcell enhancement of visible spontaneous emission in a gated plasmonic heterostructure},
author = {Lu, Yu -Jung and Sokhoyan, Ruzan and Cheng, Wen -Hui and Shirmanesh, Ghazaleh Kafaie and Davoyan, Artur R. and Pala, Ragip A. and Thyagarajan, Krishnan and Atwater, Harry A.},
abstractNote = {Emission control of colloidal quantum dots (QDs) is a cornerstone of modern high-quality lighting and display technologies. Dynamic emission control of colloidal QDs in an optoelectronic device is usually achieved by changing the optical pump intensity or injection current density. Here we propose and demonstrate a distinctly different mechanism for the temporal modulation of QD emission intensity at constant optical pumping rate. Our mechanism is based on the electrically controlled modulation of the local density of optical states (LDOS) at the position of the QDs, resulting in the modulation of the QD spontaneous emission rate, far-field emission intensity, and quantum yield. We manipulate the LDOS via field effect-induced optical permittivity modulation of an ultrathin titanium nitride (TiN) film, which is incorporated in a gated TiN/SiO2/Ag plasmonic heterostructure. In conclusion, the demonstrated electrical control of the colloidal QD emission provides a new approach for modulating intensity of light in displays and other optoelectronics.},
doi = {10.1038/s41467-017-01870-0},
journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 8,
place = {United States},
year = {2017},
month = {11}
}

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Works referenced in this record:

Low-Loss Plasmonic Metamaterials
journal, January 2011


Optical Constants of the Noble Metals
journal, December 1972