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Title: Interacting dark resonances with plasmonic meta-molecules

Abstract

Dark state physics has led to a variety of remarkable phenomena in atomic physics, quantum optics, and information theory. Here, we investigate interacting dark resonance type physics in multi-layered plasmonic meta-molecules. We theoretically demonstrate that these plasmonic meta-molecules exhibit sub-natural spectral response, analogous to conventional atomic four-level configuration, by manipulating the evanescent coupling between the bright and dark elements (plasmonic atoms). Using cascaded coupling, we show nearly 4-fold reduction in linewidth of the hybridized resonance compared to a resonantly excited single bright plasmonic atom with same absorbance. In addition, we engineered the geometry of the meta-molecules to realize efficient intramolecular excitation transfer with nearly 80%, on resonant excitation, of the total absorption being localized at the second dark plasmonic atom. An analytical description of the spectral response of the structure is presented with full electrodynamics simulations to corroborate our results. Such multilayered meta-molecules can bring a new dimension to higher quality factor plasmonic resonance, efficient excitation transfer, wavelength demultiplexing, and enhanced non-linearity at nanoscale.

Authors:
; ; ; ; ;  [1];  [1];  [2]
  1. NSF Nanoscale Science and Engineering Center (NSEC), 5130 Etcheverry Hall, University of California, Berkeley, California 94720 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22303487
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; ATOMS; COUPLING; ELECTRODYNAMICS; EXCITATION; LAYERS; MOLECULES; NANOSTRUCTURES; QUALITY FACTOR; REDUCTION; RESONANCE; SIMULATION; SPECTRAL RESPONSE; WAVELENGTHS

Citation Formats

Jha, Pankaj K., Mrejen, Michael, Kim, Jeongmin, Wu, Chihhui, Yin, Xiaobo, Wang, Yuan, Zhang, Xiang, E-mail: xiang@berkeley.edu, and Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720. Interacting dark resonances with plasmonic meta-molecules. United States: N. p., 2014. Web. doi:10.1063/1.4896035.
Jha, Pankaj K., Mrejen, Michael, Kim, Jeongmin, Wu, Chihhui, Yin, Xiaobo, Wang, Yuan, Zhang, Xiang, E-mail: xiang@berkeley.edu, & Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720. Interacting dark resonances with plasmonic meta-molecules. United States. doi:10.1063/1.4896035.
Jha, Pankaj K., Mrejen, Michael, Kim, Jeongmin, Wu, Chihhui, Yin, Xiaobo, Wang, Yuan, Zhang, Xiang, E-mail: xiang@berkeley.edu, and Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720. Mon . "Interacting dark resonances with plasmonic meta-molecules". United States. doi:10.1063/1.4896035.
@article{osti_22303487,
title = {Interacting dark resonances with plasmonic meta-molecules},
author = {Jha, Pankaj K. and Mrejen, Michael and Kim, Jeongmin and Wu, Chihhui and Yin, Xiaobo and Wang, Yuan and Zhang, Xiang, E-mail: xiang@berkeley.edu and Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720},
abstractNote = {Dark state physics has led to a variety of remarkable phenomena in atomic physics, quantum optics, and information theory. Here, we investigate interacting dark resonance type physics in multi-layered plasmonic meta-molecules. We theoretically demonstrate that these plasmonic meta-molecules exhibit sub-natural spectral response, analogous to conventional atomic four-level configuration, by manipulating the evanescent coupling between the bright and dark elements (plasmonic atoms). Using cascaded coupling, we show nearly 4-fold reduction in linewidth of the hybridized resonance compared to a resonantly excited single bright plasmonic atom with same absorbance. In addition, we engineered the geometry of the meta-molecules to realize efficient intramolecular excitation transfer with nearly 80%, on resonant excitation, of the total absorption being localized at the second dark plasmonic atom. An analytical description of the spectral response of the structure is presented with full electrodynamics simulations to corroborate our results. Such multilayered meta-molecules can bring a new dimension to higher quality factor plasmonic resonance, efficient excitation transfer, wavelength demultiplexing, and enhanced non-linearity at nanoscale.},
doi = {10.1063/1.4896035},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 11,
volume = 105,
place = {United States},
year = {2014},
month = {9}
}