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Proceedings Paper

Plasmon-enhanced optics and magneto-optics via the near field of a nanowire
Author(s): Vladimir A. Kosobukin
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Paper Abstract

A general theory is developed for surface-plasmon-enhanced near-field optics and magneto-optics via a linear nanoprobe. Considered as a model is a nanowire located near a sample with an embedded magnetic nanolayer, both nanoobjects being parallel to the surface of the sample. The nanowire is thought of as a thin noble-metal cylinder which possesses long-lived surface plasmons, and so can do the surface of noble-metal sample. With the electrodynamic Green function technique, a resonant polarization response of the complex "probe+image" is treated self-consistently within a multiple-scattering approximation. The magnetization-linear scattering events are classified in terms of TM (p-polarized) and TE (s-polarized) waves, the polarization planes of incident and scattered waves coinciding. The problem of resonant near-field magneto-optics with a linear probe is solved analytically for a nanolayer magnetized along its normal (polar magneto-optical Kerr effect). As well, in varying the in-surface distance between the near-field probe and a laterally nanosized magnetic domain, the scanning near-field microscopy in scattering mode is treated. Polarization, angle and spectroscopy characteristics of the magneto-optical resonant scatterings due to a nanowire are found and shown to differ principally from those due to a quasi-point probe. Resonant enhancement of scattering efficiency due to coupled surface plasmons of a nanowire and a sample is estimated.

Paper Details

Date Published: 28 February 2011
PDF: 12 pages
Proc. SPIE 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010, 79960F (28 February 2011); doi: 10.1117/12.887312
Show Author Affiliations
Vladimir A. Kosobukin, Ioffe Physico-Technical Institute (Russian Federation)

Published in SPIE Proceedings Vol. 7996:
Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010
Vadim P. Veiko; Tigran A. Vartanyan, Editor(s)

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