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Control of radiative processes using tunable plasmonic nanopatch antennas.

Publication ,  Journal Article
Rose, A; Hoang, TB; McGuire, F; Mock, JJ; Ciracì, C; Smith, DR; Mikkelsen, MH
Published in: Nano letters
August 2014

The radiative processes associated with fluorophores and other radiating systems can be profoundly modified by their interaction with nanoplasmonic structures. Extreme electromagnetic environments can be created in plasmonic nanostructures or nanocavities, such as within the nanoscale gap region between two plasmonic nanoparticles, where the illuminating optical fields and the density of radiating modes are dramatically enhanced relative to vacuum. Unraveling the various mechanisms present in such coupled systems, and their impact on spontaneous emission and other radiative phenomena, however, requires a suitably reliable and precise means of tuning the plasmon resonance of the nanostructure while simultaneously preserving the electromagnetic characteristics of the enhancement region. Here, we achieve this control using a plasmonic platform consisting of colloidally synthesized nanocubes electromagnetically coupled to a metallic film. Each nanocube resembles a nanoscale patch antenna (or nanopatch) whose plasmon resonance can be changed independent of its local field enhancement. By varying the size of the nanopatch, we tune the plasmonic resonance by ∼ 200 nm, encompassing the excitation, absorption, and emission spectra corresponding to Cy5 fluorophores embedded within the gap region between nanopatch and film. By sweeping the plasmon resonance but keeping the field enhancements roughly fixed, we demonstrate fluorescence enhancements exceeding a factor of 30,000 with detector-limited enhancements of the spontaneous emission rate by a factor of 74. The experiments are supported by finite-element simulations that reveal design rules for optimized fluorescence enhancement or large Purcell factors.

Duke Scholars

Published In

Nano letters

DOI

EISSN

1530-6992

ISSN

1530-6984

Publication Date

August 2014

Volume

14

Issue

8

Start / End Page

4797 / 4802

Related Subject Headings

  • Nanoscience & Nanotechnology
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Rose, A., Hoang, T. B., McGuire, F., Mock, J. J., Ciracì, C., Smith, D. R., & Mikkelsen, M. H. (2014). Control of radiative processes using tunable plasmonic nanopatch antennas. Nano Letters, 14(8), 4797–4802. https://doi.org/10.1021/nl501976f
Rose, Alec, Thang B. Hoang, Felicia McGuire, Jack J. Mock, Cristian Ciracì, David R. Smith, and Maiken H. Mikkelsen. “Control of radiative processes using tunable plasmonic nanopatch antennas.Nano Letters 14, no. 8 (August 2014): 4797–4802. https://doi.org/10.1021/nl501976f.
Rose A, Hoang TB, McGuire F, Mock JJ, Ciracì C, Smith DR, et al. Control of radiative processes using tunable plasmonic nanopatch antennas. Nano letters. 2014 Aug;14(8):4797–802.
Rose, Alec, et al. “Control of radiative processes using tunable plasmonic nanopatch antennas.Nano Letters, vol. 14, no. 8, Aug. 2014, pp. 4797–802. Epmc, doi:10.1021/nl501976f.
Rose A, Hoang TB, McGuire F, Mock JJ, Ciracì C, Smith DR, Mikkelsen MH. Control of radiative processes using tunable plasmonic nanopatch antennas. Nano letters. 2014 Aug;14(8):4797–4802.
Journal cover image

Published In

Nano letters

DOI

EISSN

1530-6992

ISSN

1530-6984

Publication Date

August 2014

Volume

14

Issue

8

Start / End Page

4797 / 4802

Related Subject Headings

  • Nanoscience & Nanotechnology