Magnetic Light-Matter Interactions in a Photonic Crystal Nanocavity

Year: 2010

Authors: Burresi M., Kampfrath T., Van Oosten D., Prangsma J.C., Song B.S., Noda S., Kuipers L.

Autors Affiliation: Center for Nanophotonics, FOM Institute for Atomic and Molecular Physics (AMOLF), Science Park 104, 1098 XG Amsterdam, The Netherlands;
Department of Electronic Science and Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan; School of Information and Communication Engineering, Sungkyunkwan University, Janan-Gu, Suwon Gyeonggi-do 440-746, South Korea

Abstract: We study the magnetic coupling between a metal-coated near-field probe and a photonic crystal nanocavity. The resonance of the nanocavity shifts to shorter wavelengths when the ringlike apex of the probe is above an antinode of the magnetic field of the cavity. We show that this can be attributed to a magnetic light-matter interaction and is in fact a manifestation of Lenz’s law at optical frequencies. We use these measurements to determine the magnetic polarizability of the apex of the probe and find good agreement with theory. We discuss how this method could be applied to study the electric and magnetic polarizibilities of nano-objects.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 105 (12)      Pages from: 123901-1  to: 123901-4

KeyWords: Near-field optics
DOI: 10.1103/PhysRevLett.105.123901

Citations: 80
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