Strongly polarized scattering in surface enhanced raman spectroscopy of randomly distributed molecules on gold nanowires
Year: 2011
Authors: Fazio B., Gucciardi PG., D’Andrea C., Irrera A., Bonaccorso F., Calogero G., Vasi C., Allegrini M., Toma A., Chiappe D., Martella C., De Mongeot F.B.
Autors Affiliation: CNR IPCF, Ist Processi Chim Fis, Via F Stagno Alcontres 37, I-98158 Messina, Italy; Univ Pisa, I-56126 Pisa, Italy; INO CNR Sez Pisa, Dipartimento Fis Enrico Fermi, I-56126 Pisa, Italy; Univ Genoa, I-16146 Genoa, Italy; Consorzio Nazl Interuniv Sci Fis Mat CNISM, Dipartmento Fis, I-16146 Genoa, Italy.
Abstract: We study the polarized Surface Enhanced Raman Scattering from randomly oriented molecules adsorbed on near-field coupled gold nanowires. We show that the scattering is polarized always along the wire-to-wire nanocavities. We find the exact angular dependence for the polarized, unpolarized, parallel- and cross-polarized SERS intensity. Finally we develop a model that fits the experimental data and allows to measure the field enhancement and the re-radiation enhancement factors, independently, and retrieve the depolarization ratio of the probe molecules.
Journal/Review: ATTI ACCADEMIA PELORITANA DEI PERICOLANTI-CLASSE DI SCIENZE FISICHE MATEMATICHE E NATURALI
Volume: 89 Pages from: C1V89S1P034-1 to: C1V89S1P034-3
More Information: The research leading to these results has received funding from MIUR under Project PRIN 2008J858Y7. B.F., C.D’A., and P.G.G. acknowledge funding from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no 241818 (FP7-HEALTH-F5-2009-241818-NANOANTENNA). F.B.d.M. acknowledges support by CNISM under project Innesco, by MAE under program Italia-Polonia, by Fondazione CARIGE and by ENEA under contract MSE.KeyWords: SersDOI: 10.1478/C1V89S1P034Connecting to view paper tab on IsiWeb: Click here