Photoresponsive polymers for topographic simulation of the optical near-field of a nanometer sized gold tip in a highly focused laser beam | Zendy

Yann Gilbert | Zendy; Renaud Bachelot | Zendy; Alexandre Vial | Zendy; Gilles Lérondel | Zendy; Pascal Royer | Zendy; Alexandre Bouhélier | Zendy; Gary P. Wiederrecht | Zendy

Open Access

Photoresponsive polymers for topographic simulation of the optical near-field of a nanometer sized gold tip in a highly focused laser beam

Author(s) -

Yann Gilbert,

Renaud Bachelot,

Alexandre Vial,

Gilles Lérondel,

Pascal Royer,

Alexandre Bouhélier,

Gary P. Wiederrecht

Publication year - 2005

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.13.003619

Subject(s) - materials science , optics , polymer , nanometre , diffraction , azobenzene , near field scanning optical microscope , near field optics , laser , nanoscopic scale , microscopy , near and far field , optical microscope , optoelectronics , nanotechnology , scanning electron microscope , physics , composite material

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.

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