Effective Wavelength Scaling of and Damping in Plasmonic Helical Antennae
Caridad JM, McCloskey D, Rossella F, Bellani V, Donegan JF, Krstic V (2015)
Publication Language: English
Publication Type: Journal article, Letter
Publication year: 2015
Journal
Publisher: American Chemical Society
Book Volume: 2
Pages Range: 675–679
URI: http://pubs.acs.org/journal/apchd5
DOI: 10.1021/acsphotonics.5b00076
Abstract
We report on the optical performance of metallic nanohelices as the extension of the helical antenna concept into the optical wavelength range. These helical nanoparticles exhibit a structure and material dependent optical response due to the existence of a longitudinal localized-plasmon resonance which scales linearly with the total length of the helix; thus, comprising the number of turns and the single-turn length of the nanohelix. This is in contrast with macroscopic metallic helices, where the scaling of their operational mode is only determined by the length of a single turn. We show how the plasmon damping is radiated or absorbed depending on the interband activity of the metal forming the nanohelix. This study demonstrates the ability of helical structures to control and manipulate optical fields at the nanometer scale according to their specific shape and material composition.
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APA:
Caridad, J.M., McCloskey, D., Rossella, F., Bellani, V., Donegan, J.F., & Krstic, V. (2015). Effective Wavelength Scaling of and Damping in Plasmonic Helical Antennae. ACS Photonics, 2, 675–679. https://dx.doi.org/10.1021/acsphotonics.5b00076
MLA:
Caridad, Jose M., et al. "Effective Wavelength Scaling of and Damping in Plasmonic Helical Antennae." ACS Photonics 2 (2015): 675–679.
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