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Title: Probing Purcell enhancement in plasmonic nanoantennas by broadband luminescent Si quantum dots

Abstract

Colloidal silicon quantum dots (Si QDs) with a very broad photoluminescence (PL) band are proposed as a probe to monitor the Purcell enhancement in a plasmonic nanostructure. Si QDs placed on an arbitrary plasmonic nanostructure enable us to determine the Purcell enhancement factors in a broad spectral range (600–900 nm). As a proof-of-concept experiment, a layer of Si QDs is spin-coated on gold film-over nanosphere structures, and the Purcell enhancement is quantitatively determined from the analyses of the PL spectra and the decay rates. The method proposed in this work provides a facile approach to quantitatively measure the performance of plasmonic substrates for PL and Raman enhancements.

Authors:
; ; ; ;  [1]
  1. Department of Electrical and Electronic Engineering, Graduate School of Engineering, Kobe University, Rokkodai, Nada, Kobe 657-8501 (Japan)
Publication Date:
OSTI Identifier:
22590773
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DECAY; FILMS; GOLD; LAYERS; PERFORMANCE; PHOTOLUMINESCENCE; PROBES; QUANTUM DOTS; SUBSTRATES

Citation Formats

Sugimoto, Hiroshi, Yashima, Shiho, Furuta, Kenta, Inoue, Asuka, and Fujii, Minoru, E-mail: fujii@eedept.kobe-u.ac.jp. Probing Purcell enhancement in plasmonic nanoantennas by broadband luminescent Si quantum dots. United States: N. p., 2016. Web. doi:10.1063/1.4953829.
Sugimoto, Hiroshi, Yashima, Shiho, Furuta, Kenta, Inoue, Asuka, & Fujii, Minoru, E-mail: fujii@eedept.kobe-u.ac.jp. Probing Purcell enhancement in plasmonic nanoantennas by broadband luminescent Si quantum dots. United States. doi:10.1063/1.4953829.
Sugimoto, Hiroshi, Yashima, Shiho, Furuta, Kenta, Inoue, Asuka, and Fujii, Minoru, E-mail: fujii@eedept.kobe-u.ac.jp. 2016. "Probing Purcell enhancement in plasmonic nanoantennas by broadband luminescent Si quantum dots". United States. doi:10.1063/1.4953829.
@article{osti_22590773,
title = {Probing Purcell enhancement in plasmonic nanoantennas by broadband luminescent Si quantum dots},
author = {Sugimoto, Hiroshi and Yashima, Shiho and Furuta, Kenta and Inoue, Asuka and Fujii, Minoru, E-mail: fujii@eedept.kobe-u.ac.jp},
abstractNote = {Colloidal silicon quantum dots (Si QDs) with a very broad photoluminescence (PL) band are proposed as a probe to monitor the Purcell enhancement in a plasmonic nanostructure. Si QDs placed on an arbitrary plasmonic nanostructure enable us to determine the Purcell enhancement factors in a broad spectral range (600–900 nm). As a proof-of-concept experiment, a layer of Si QDs is spin-coated on gold film-over nanosphere structures, and the Purcell enhancement is quantitatively determined from the analyses of the PL spectra and the decay rates. The method proposed in this work provides a facile approach to quantitatively measure the performance of plasmonic substrates for PL and Raman enhancements.},
doi = {10.1063/1.4953829},
journal = {Applied Physics Letters},
number = 24,
volume = 108,
place = {United States},
year = 2016,
month = 6
}
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