Directional out-coupling of light from a plasmonic nanowire-nanoparticle junction

Danveer Singh; Arindam Dasgupta; V. G. Aswathy; Ravi P.N. Tripathi; G. V.Pavan Kumar

doi:10.1364/OL.40.001006

Directional out-coupling of light from a plasmonic nanowire-nanoparticle junction

Danveer Singh, Arindam Dasgupta, V. G. Aswathy, Ravi P.N. Tripathi, G. V.Pavan Kumar

Indian Institute of Science Education and Research Pune

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We experimentally show how a single Ag nanoparticle (NP) coupled to an Ag nanowire (NW) can convert propagating surface plasmon polaritons to directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we show single- And dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate and air-superstrate. Furthermore, we show NW-NP junction can influence the directionality of molecular-fluorescence emission, thus functioning as an optical antenna. The results discussed herein may have implications in realizing directional single-photon sources and quantum plasmon circuitry.

Original language	English
Pages (from-to)	1006-1009
Number of pages	4
Journal	Optics Letters
Volume	40
Issue number	6
DOIs	https://doi.org/10.1364/OL.40.001006
State	Published - 15 Mar 2015
Externally published	Yes

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© 2015 Optical Society of America.

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abstract = "We experimentally show how a single Ag nanoparticle (NP) coupled to an Ag nanowire (NW) can convert propagating surface plasmon polaritons to directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we show single- And dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate and air-superstrate. Furthermore, we show NW-NP junction can influence the directionality of molecular-fluorescence emission, thus functioning as an optical antenna. The results discussed herein may have implications in realizing directional single-photon sources and quantum plasmon circuitry.",

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AU - Dasgupta, Arindam

AU - Aswathy, V. G.

AU - Tripathi, Ravi P.N.

AU - Kumar, G. V.Pavan

PY - 2015/3/15

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N2 - We experimentally show how a single Ag nanoparticle (NP) coupled to an Ag nanowire (NW) can convert propagating surface plasmon polaritons to directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we show single- And dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate and air-superstrate. Furthermore, we show NW-NP junction can influence the directionality of molecular-fluorescence emission, thus functioning as an optical antenna. The results discussed herein may have implications in realizing directional single-photon sources and quantum plasmon circuitry.

AB - We experimentally show how a single Ag nanoparticle (NP) coupled to an Ag nanowire (NW) can convert propagating surface plasmon polaritons to directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we show single- And dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate and air-superstrate. Furthermore, we show NW-NP junction can influence the directionality of molecular-fluorescence emission, thus functioning as an optical antenna. The results discussed herein may have implications in realizing directional single-photon sources and quantum plasmon circuitry.

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Directional out-coupling of light from a plasmonic nanowire-nanoparticle junction

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