Measuring the spatial extent of individual localized photonic states

M. Spasenovic; D.M. Beggs; Philippe Lalanne; T.F. Krauss; L. Kuipers

Measuring the spatial extent of individual localized photonic states

M. Spasenovic ¹ D.M. Beggs ¹ Philippe Lalanne ² T.F. Krauss ³ L. Kuipers ¹

1 Center for Nanophotonics

2 lp2n-03,lp2n-13

LP2N - Laboratoire Photonique, Numérique et Nanosciences

3 School of Physics and Astronomy

Abstract : We measure the spatial extent of individual photonic states that are localized by residual disorder in a slow-light photonic crystal waveguide. The size of the states is measured by locally perturbing them individually through an electromagnetic interaction with a near-field probe. We identify localized states that are not observed in transmission and show that they are shorter than the waveguide length. We also obtain near-field measurements of the participation ratio, from which the size of the states is also derived, in quantitative agreement with the size measured with the perturbation method.

Document type :

Journal articles

Domain :

Engineering Sciences [physics] / Optics / Photonic

Physics [physics] / Physics [physics] / Optics [physics.optics]

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