 |
Journal articles
Photoresponsive polymers for topographic simulation of the optical near-field of a nanometer sized gold tip in a highly focused laser beam
Abstract : The local perturbation of a diffraction-limited spot by a nanometer sized gold tip in a popular apertureless scanning near-field optical microscopy (ASNOM) configuration is reproduced through topography changes in a photoresponsive polymer. Our method relies on the observation of the photochemical migration of azobenzene molecules grafted to a polymer placed beneath the tip. A local molecular displacement has been shown to be activated by a gold tip as a consequence of the lateral surface charge density present at the edges of the tip’s end, resulting from a strong near-field depolarization predicted by theory.
https://hal-utt.archives-ouvertes.fr/hal-02441865
Contributor : Daniel Gavrysiak <>
Submitted on : Thursday, January 16, 2020 - 11:08:24 AM
Last modification on : Tuesday, October 6, 2020 - 4:30:49 PM
Contributor : Daniel Gavrysiak <>
Submitted on : Thursday, January 16, 2020 - 11:08:24 AM
Last modification on : Tuesday, October 6, 2020 - 4:30:49 PM