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.
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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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