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

23 December 2013 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

Author Affiliations +

Journal of Nanophotonics, Vol. 8, Issue 1, 083899 (December 2013). https://doi.org/10.1117/1.JNP.8.083899

Abstract

Surface-enhanced Raman scattering (SERS) has emerged as a powerful tool to probe molecules at nanoscale. By utilizing plasmon polaritons on metallic nanowires, remote-excitation 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 remote-excitation 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 counter-propagating 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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Arindam Dasgupta, Danveer Singh, Shreyash Tandon, Ravi P. N. Tripathi, and G. V. Pavan Kumar "Remote-excitation surface-enhanced Raman scattering with counter-propagating plasmons: silver nanowire-nanoparticle system," Journal of Nanophotonics 8(1), 083899 (23 December 2013). https://doi.org/10.1117/1.JNP.8.083899

Published: 23 December 2013

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