title: Magnetic imaging in photonic crystal microcavities.
abstract: We demonstrate the nonresonant magnetic interaction at optical frequencies between a photonic crystal microcavity and a metallized near-field microscopy probe. This interaction can be used to map and control the magnetic component of the microcavity modes. The metal coated tip acts as a microscopic conductive ring, which induces a magnetic response opposite to the inducing magnetic field. The resulting shift in resonance frequency can be used to measure the distribution of the magnetic field intensity of the photonic structure and fine-tune its optical response via the magnetic field components.
authors.affiliation: European Laboratory for Non-linear Spectroscopy, 50019 Sesto Fiorentino (FI), Italy. vignolini@lens.unifi.it
authors.forename: Silvia
authors.initials: S
authors.lastname: Vignolini
authors.forename: Francesca
authors.initials: F
authors.lastname: Intonti
authors.forename: Francesco
authors.initials: F
authors.lastname: Riboli
authors.forename: Laurent
authors.initials: L
authors.lastname: Balet
authors.forename: Lianhe H
authors.initials: LH
authors.lastname: Li
authors.forename: Marco
authors.initials: M
authors.lastname: Francardi
authors.forename: Annamaria
authors.initials: A
authors.lastname: Gerardino
authors.forename: Andrea
authors.initials: A
authors.lastname: Fiore
authors.forename: Diederik S
authors.initials: DS
authors.lastname: Wiersma
authors.forename: Massimo
authors.initials: M
authors.lastname: Gurioli