Near-Field Mapping of Plasmonic Antennas by Multiphoton Absorption in Poly(methyl methacrylate)
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Date
2012-09
Publication Type
Journal Article
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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. © 2012 American Chemical Society.
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published
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12 (9)
Pages / Article No.
4864 - 4868
Publisher
American Chemical Society
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Subject
Near-field mapping; nanoantennas; plasmonics; photosensitive polymers; PMMA; multiphoton absorption
Organisational unit
09698 - Quidant, Romain / Quidant, Romain