Abstract
We demonstrate how a silver-nanowire-dimer can be employed to optically excite dual-path surface-plasmon-polaritons and utilize them to perform remote-excitation surface-enhanced Raman scattering (SERS) microscopy. Interestingly, this unique geometry allows us to perform dual-path remote-excitation SERS. Our experiments show that for the same value of excitation-laser powers, dual-path excitation leads to enhanced-SERS signal compared to single-path excitation, which has been corroborated by 3-D finite-difference time-domain simulations. Furthermore, we show that SERS-enhancement can be remotely modulated in this geometry by varying the polarization of excitation-fields. The results discussed herein can be extrapolated to remote-excitation pump-probe spectroscopy and dual-colour optical interrogation.
| Original language | English |
|---|---|
| Article number | 151114 |
| Journal | Applied Physics Letters |
| Volume | 103 |
| Issue number | 15 |
| DOIs | |
| State | Published - 7 Oct 2013 |
| Externally published | Yes |
Bibliographical note
Funding Information:This research work was partially funded by DST-SERB Grant (SR/S2/LOP-0007/2011) and DST Nanoscience Unit Grant (SR/NM/NS-42/2009). G.V.P.K. thanks DST, India for Ramanujan Fellowship and Dr. Shouvik Datta of IISER-Pune for discussion.
Funding
This research work was partially funded by DST-SERB Grant (SR/S2/LOP-0007/2011) and DST Nanoscience Unit Grant (SR/NM/NS-42/2009). G.V.P.K. thanks DST, India for Ramanujan Fellowship and Dr. Shouvik Datta of IISER-Pune for discussion.
| Funders | Funder number |
|---|---|
| DST-SERB | SR/S2/LOP-0007/2011 |
| IISER-Pune | |
| Department of Science and Technology, Ministry of Science and Technology, India | SR/NM/NS-42/2009 |