Open AccessMagnetic field concentrator for probing optical magnetic metamaterials
Author(s) -
Tomasz J. Antosiewicz,
Piotr Wróbel,
Tomasz Szoplik
Publication year - 2010
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.025906
Subject(s) - metamaterial , optics , magnetic field , split ring resonator , plasmon , materials science , transformation optics , concentrator , dielectric , nanophotonics , photonic metamaterial , optoelectronics , physics , quantum mechanics
Development of all dielectric and plasmonic metamaterials with a tunable optical frequency magnetic response creates a need for new inspection techniques. We propose a method of measuring magnetic responses of such metamaterials within a wide range of optical frequencies with a single probe. A tapered fiber probe with a radially corrugated metal coating concentrates azimuthally polarized light in the near-field into a subwavelength spot the longitudinal magnetic field component which is much stronger than the perpendicular electric one. The active probe may be used in a future scanning near-field magnetic microscope for studies of magnetic responses of subwavelength elementary cells of metamaterials.