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Sondes actives pour l'optique en champ proche à base de nanoparticules isolantes ou de nanodiamants fluorescents

Aurelien Cuche 1
1 NOF - Nano-Optique et Forces
NEEL - Institut Néel
Abstract : In the " aperture NSOM " configuration, the optical resolution is limited to 50-100 nm in the best cases. In order to probe the optical properties of systems which exhibit dimensions at the nanoscale, a better optical resolution would be advantageous. To reach this goal, we suggest the use of an optical active probe. This kind of probe is based on a fluorescent nano-emitter grafted at the apex of a classical dielectric optical probe. The resolution expected in the optical near-field should be ultimately only limited by the size of the nano-object, that is well below 50 nm. On the basis of previous works done in our laboratory, we present here two new methods for obtaining such optical active probes. These new probes involve two complementary kinds of nanoparticles with attractive sizes and good optical properties (like high emission rate in the visible and excellent photostability). The first method implies YAG nanoparticles synthesized and deposited at the apex of a probe using LECBD (Low Energy Cluster Beam Deposition). The second approach is based on the in situ selection of a nanodiamond hosting color centers (NV) which is attached onto the tip with the help of a charged polymer. Finally, we report on the realization of a room-temperature scanning single-photon probe based on a 20 nm nanodiamond hosting a single NV center, which has been successfully used for NSOM imaging. Such tips should ultimately offer a better resolution than classical optical near-field probes, and should also open new perspectives in various fields like quantum optics/plasmonics or high-resolution, high-sensitivity magnetometry.
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Submitted on : Monday, February 15, 2010 - 1:58:55 PM
Last modification on : Tuesday, April 6, 2021 - 5:16:02 PM
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  • HAL Id : tel-00456562, version 1

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CNRS | UJF | NEEL | UGA

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Aurelien Cuche. Sondes actives pour l'optique en champ proche à base de nanoparticules isolantes ou de nanodiamants fluorescents. Physique Atomique [physics.atom-ph]. Université Joseph-Fourier - Grenoble I, 2009. Français. ⟨tel-00456562⟩

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