BROWSE

Related Researcher

Author's Photo

Jun, Young Chul
Laboratory of Nanophotonics & Metamaterials (NanoMeta)
Research Interests
  • Nanophotonics, plasmonics, metamaterials, 4D printing, programmable matter, smart materials

ITEM VIEW & DOWNLOAD

Strong Modification of Quantum Dot Spontaneous Emission via Gap Plasmon Coupling in Metal Nanoslits

Cited 33 times inthomson ciCited 37 times inthomson ci
Title
Strong Modification of Quantum Dot Spontaneous Emission via Gap Plasmon Coupling in Metal Nanoslits
Author
Jun, Young ChulPala, RagipBrongersma, Mark L.
Keywords
WAVE-GUIDES; SINGLE; FLUORESCENCE; LIGHT
Issue Date
2010-04
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.114, no.16, pp.7269 - 7273
Abstract
A metal-dielectric-metal (MDM) waveguide with a nanoscale gap supports highly confined surface plasmon-polariton modes, termed gap plasmons. The spontaneous emission of an emitter placed in such a metal nanogap is expected to be strongly modi fled due to coupling to gap plasmons. We investigate the light emission properties of semiconductor quantum dots (QD) in a metal nanoslit, which is a truncated MDM waveguide. More specifically, we measure both the lifetime and the state of polarization of the out-coupled QD emission from a metal nanoslit. We observe clear lifetime and polarization changes of QD emission. As the slit width gets smaller, the QD exciton lifetime gradually decreases, and its emission becomes polarized normal to the slit, as expected for gap plasmon coupled light emission. We also find that the polarization of the collected QD emission is flipped (i.e., becomes parallel to a slit) when the excited emitters are located just outside the slit. We have conducted dipole emission calculations in metal nanoslits, and these explain the experimentally observed lifetime and polarization changes well. These findings may have novel applications in nanoscale optical sources, sensors, and active devices
URI
Go to Link
DOI
10.1021/jp9083376
ISSN
1932-7447
Appears in Collections:
MSE_Journal Papers
Files in This Item:
jp9083376.pdf Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU