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Near-Field Mapping of Plasmonic Antennas by Multiphoton Absorption in Poly(methyl methacrylate)

Volpe, G; Noack, M; Acimovic, SS; Reinhardt, C; Quidant, R; (2012) Near-Field Mapping of Plasmonic Antennas by Multiphoton Absorption in Poly(methyl methacrylate). Nano Letters , 12 (9) pp. 4864-4868. 10.1021/nl3023912. Green open access

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Abstract

Mapping the optical near-field response around nanoantennas is a challenging yet indispensable task to engineer light-matter interaction at the nanometer scale. Recently, photosensitive molecular probes, which undergo morphological or chemical changes induced by the local optical response of the nanostructures, have been proposed as a handy alternative to more cumbersome optical and electron-based techniques. Here, we report four-photon absorption in poly(methyl methacrylate) (PMMA) as a very promising tool for nanoimaging the optical near-field around nanostructures over a broad range of near-infrared optical wavelengths. The high performance of our approach is demonstrated on single-rod antennas and coupled gap antennas by comparing experimental maps with 3D numerical simulations of the electric near-field intensity.

Type: Article
Title: Near-Field Mapping of Plasmonic Antennas by Multiphoton Absorption in Poly(methyl methacrylate)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/nl3023912
Publisher version: https://doi.org/10.1021/nl3023912
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions.
Keywords: Near-field mapping; nanoantennas; plasmonics; photosensitive polymers; PMMA; multiphoton absorption
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10125190
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