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.

Additional Metadata
Publisher APS
Persistent URL dx.doi.org/10.1103/PhysRevB.86.155153
Journal Phys. Rev. B
Citation
Spasenović, M, Beggs, D. M, Lalanne, P, Krauss, T. F, & Kuipers, L. (2012). Measuring the spatial extent of individual localized photonic states. Phys. Rev. B, 86(Article number: 155153), 1–5. doi:10.1103/PhysRevB.86.155153