Special Section on Metamaterials and Photonic Nanostructures

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

[+] Author Affiliations
Arindam Dasgupta

Indian Institute of Science Education and Research Pune, Departments of Physics and Chemistry, Photonics and Optical Nanoscopy Laboratory, Pune 411008, India

Danveer Singh

Indian Institute of Science Education and Research Pune, Departments of Physics and Chemistry, Photonics and Optical Nanoscopy Laboratory, Pune 411008, India

Shreyash Tandon

Indian Institute of Science Education and Research Pune, Departments of Physics and Chemistry, Photonics and Optical Nanoscopy Laboratory, Pune 411008, India

Ravi P. N. Tripathi

Indian Institute of Science Education and Research Pune, Departments of Physics and Chemistry, Photonics and Optical Nanoscopy Laboratory, Pune 411008, India

G. V. Pavan Kumar

Indian Institute of Science Education and Research Pune, Departments of Physics and Chemistry, Photonics and Optical Nanoscopy Laboratory, Pune 411008, India

J. Nanophoton. 8(1), 083899 (Dec 23, 2013). doi:10.1117/1.JNP.8.083899
History: Received September 20, 2013; Revised October 22, 2013; Accepted October 23, 2013
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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, 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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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

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", J. Nanophoton. 8(1), 083899 (Dec 23, 2013). ; http://dx.doi.org/10.1117/1.JNP.8.083899


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