Grating-assisted superresolution of slow waves in Fourier space

N. Le Thomas, R. Houdré, Lars Hagedorn Frandsen, Jacob Fage-Pedersen, Andrei Lavrinenko, Peter Ingo Borel

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We present a far-field optical technique allowing the measurement of the dispersion relation of electromagnetic fields propagating under the light cone in photonic nanostuctures. It relies on the use of a one-dimensional grating to probe the evanescent tail of the guided field in combination with a high numerical aperture Fourier space imaging set-up. A high-resolution spectroscopy of the far-field emission diagram allows us to accurately and efficiently determine the dispersion curve and the group-index dispersion of planar photonic waveguides operating in the slow light regime.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Issue number3
Pages (from-to)035103
Publication statusPublished - 2007

Bibliographical note

Copyright 2007 American Physical Society


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