naa a22 4500 510817904 CHVBK 20180411083517.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-012-9436-3 doi (NATIONALLICENCE)springer-10.1007/s11468-012-9436-3 Complex Polarization Response in Plasmonic Nanospirals [Elektronische Daten] [Jed Ziegler, Richard Haglund Jr.] Archimedean nanospirals exhibit many far-field resonances that result from the lack of symmetry and strong intra-spiral plasmonic interactions. Here, we present a computational study, with corroborating experimental results, on the plasmonic response of the 4π Archimedean spiral as a function of incident polarization, for spirals in which the largest linear dimension is less than 550nm. We discuss the modulation of the near-field structure for linearly and circularly polarized light in typical nanospiral configurations. Computational studies of the near-field distributions excited by circularly polarized light illustrate the effects of chirality on plasmonic mechanisms, while rotation of linearly polarized light provides a detailed view of the effects of broken symmetry on nanospiral fields in any given direction in the plane of the spiral. The rotational geometry exhibits a preference for circular polarization that increases near-field enhancement compared to excitation with linearly polarized light and exchanges near-field configurations and resonant modes. By analyzing the effects of polarization and wavelength on the near-field configurations, we also show how the nanospiral could be deployed in applications such as tunable near-field enhancement of nonlinear optical signals from chiral molecules. Springer Science+Business Media, LLC, 2012 Nanospirals nationallicence Polarization modulation nationallicence Near-field modulation nationallicence Ziegler Jed Department of Physics and Astronomy, Vanderbilt University, 37235-1807, Nashville, TN, USA aut Haglund Jr. Richard Department of Physics and Astronomy, Vanderbilt University, 37235-1807, Nashville, TN, USA aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 571-579 1557-1955 8:2<571 2013 8 11468 https://doi.org/10.1007/s11468-012-9436-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-012-9436-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ziegler Jed Department of Physics and Astronomy, Vanderbilt University, 37235-1807, Nashville, TN, USA aut NATIONALLICENCE 700 1- Haglund Jr Richard Department of Physics and Astronomy, Vanderbilt University, 37235-1807, Nashville, TN, USA aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 571-579 1557-1955 8:2<571 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer