Broadband and broadangle SPP antennas based on plasmonic crystals with linear chirp

Bouillard, J. S.; Vilain, S.; Dickson, W.; Wurtz, G. A.; Zayats, A. V.

Abstract

Plasmonic technology relies on the coupling of light to surface electromagnetic modes on smooth or structured metal surfaces. While some applications utilise the resonant nature of surface polaritons, others require broadband characteristics. We demonstrate unidirectional and broadband plasmonic antennas with large acceptance angles based on chirped plasmonic gratings. Near-field optical measurements have been used to visualise the excitation of surface plasmon polaritons by such aperiodic structures. These weakly aperiodic plasmonic crystals allow the formation of a trapped rainbow-type effect in a two-dimensional geometry as surface polaritons of different frequencies are coherently excited in different locations over the plasmonic structure. Both the crystal's finite size and the finite lifetime of plasmonic states are crucial for the generation of broadband surface plasmon polaritons. This approach presents new opportunities for building unidirectional, broadband and broad-angle plasmonic couplers for sensing purposes, information processing, photovoltaic applications and shaping and manipulating ultrashort optical pulses. © 2012 Macmillan Publishers Limited. All rights reserved.

Citation

Bouillard, J. S., Vilain, S., Dickson, W., Wurtz, G. A., & Zayats, A. V. (2012). Broadband and broadangle SPP antennas based on plasmonic crystals with linear chirp. Scientific reports, 2(1), Article 829. https://doi.org/10.1038/srep00829

• Journal Article Type: Article
• Acceptance Date: Oct 8, 2012
• Online Publication Date: Nov 20, 2012
• Publication Date: Dec 14, 2012
• Deposit Date: May 6, 2020
• Publicly Available Date: May 29, 2020
• Journal: Scientific Reports
• Print ISSN: 2045-2322
• Electronic ISSN: 2045-2322
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 2
• Issue: 1
• Article Number: 829
• DOI: https://doi.org/10.1038/srep00829
• Keywords: Imaging; Optical materials; Optical physics; Optical spectroscopy
• Public URL: https://hull-repository.worktribe.com/output/1788946
• Publisher URL: https://www.nature.com/articles/srep00829