Remote-excitation surface-enhanced Raman scattering with counter-propagating plasmons: Silver nanowire-nanoparticle system

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

doi:10.1117/1.jnp.8.083899

Remote-excitation surface-enhanced Raman scattering with counter-propagating plasmons: Silver nanowire-nanoparticle system

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

Indian Institute of Science Education and Research Pune

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

15 Scopus citations

Abstract

Surface-enhanced Raman scattering (SERS) has emerged as a powerful tool to probe molecules at nanoscale. By utilizing plasmon polaritons on metallic nanowires, remoteexcitation SERS can be achieved. Enhancement and modulation of remote-SERS intensity are vital for nano-optical spectroscopy. Counter-propagating plasmons have been excited in a plasmonic nanowire-nanoparticle (NW-NP) system and further utilized to perform remoteexcitation SERS. By using the polarization of counter-propagating fields, remote-SERS intensity from NW-NP hot-spot junction was enhanced and modulated. Such capabilities of counterpropagating plasmons to control optical fields and SERS intensity at NW-NP junction can have implications in nanowire photonics and nano-optical spectroscopy.

Original language	English
Article number	083899
Journal	Journal of Nanophotonics
Volume	8
Issue number	1
DOIs	https://doi.org/10.1117/1.jnp.8.083899
State	Published - 2014
Externally published	Yes

Bibliographical note

Funding Information:
This research was partially funded by DST-SERB Grant No. (SR/S2/LOP-0007/2011) and DST Nanoscience Unit Grant No. (SR/NM/NS-42/2009). G.V.P.K. thanks DST, India for Ramanujan Fellowship. G.V.P.K. conceived the experiments and supervised the project, A.D. performed optical measurements and numerical simulations, D.S. prepared the coupled nanowire samples, S.T. assisted in optical measurements, R.T. assisted in fabrication and SEM imaging, and G.V.P.K., A.D., and D.S. wrote the manuscript.

Funding

This research was partially funded by DST-SERB Grant No. (SR/S2/LOP-0007/2011) and DST Nanoscience Unit Grant No. (SR/NM/NS-42/2009). G.V.P.K. thanks DST, India for Ramanujan Fellowship. G.V.P.K. conceived the experiments and supervised the project, A.D. performed optical measurements and numerical simulations, D.S. prepared the coupled nanowire samples, S.T. assisted in optical measurements, R.T. assisted in fabrication and SEM imaging, and G.V.P.K., A.D., and D.S. wrote the manuscript.

Funders	Funder number
DST-SERB	SR/S2/LOP-0007/2011
Department of Science and Technology, Ministry of Science and Technology, India	SR/NM/NS-42/2009

Keywords

hot-spot
nanowire
plasmonics
remote-excitation
surface-enhanced Raman scattering

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10.1117/1.jnp.8.083899

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abstract = "Surface-enhanced Raman scattering (SERS) has emerged as a powerful tool to probe molecules at nanoscale. By utilizing plasmon polaritons on metallic nanowires, remoteexcitation SERS can be achieved. Enhancement and modulation of remote-SERS intensity are vital for nano-optical spectroscopy. Counter-propagating plasmons have been excited in a plasmonic nanowire-nanoparticle (NW-NP) system and further utilized to perform remoteexcitation SERS. By using the polarization of counter-propagating fields, remote-SERS intensity from NW-NP hot-spot junction was enhanced and modulated. Such capabilities of counterpropagating plasmons to control optical fields and SERS intensity at NW-NP junction can have implications in nanowire photonics and nano-optical spectroscopy.",

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author = "Arindam Dasgupta and Danveer Singh and Shreyash Tandon and Tripathi, {Ravi P.N.} and {Pavan Kumar}, {G. V.}",

note = "Funding Information: This research was partially funded by DST-SERB Grant No. (SR/S2/LOP-0007/2011) and DST Nanoscience Unit Grant No. (SR/NM/NS-42/2009). G.V.P.K. thanks DST, India for Ramanujan Fellowship. G.V.P.K. conceived the experiments and supervised the project, A.D. performed optical measurements and numerical simulations, D.S. prepared the coupled nanowire samples, S.T. assisted in optical measurements, R.T. assisted in fabrication and SEM imaging, and G.V.P.K., A.D., and D.S. wrote the manuscript.",

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AB - Surface-enhanced Raman scattering (SERS) has emerged as a powerful tool to probe molecules at nanoscale. By utilizing plasmon polaritons on metallic nanowires, remoteexcitation SERS can be achieved. Enhancement and modulation of remote-SERS intensity are vital for nano-optical spectroscopy. Counter-propagating plasmons have been excited in a plasmonic nanowire-nanoparticle (NW-NP) system and further utilized to perform remoteexcitation SERS. By using the polarization of counter-propagating fields, remote-SERS intensity from NW-NP hot-spot junction was enhanced and modulated. Such capabilities of counterpropagating plasmons to control optical fields and SERS intensity at NW-NP junction can have implications in nanowire photonics and nano-optical spectroscopy.

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Remote-excitation surface-enhanced Raman scattering with counter-propagating plasmons: Silver nanowire-nanoparticle system

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Bibliographical note

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Keywords

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