Observation of nonlinear bands in near-field scanning optical microscopy of a photonic-crystal waveguide

A. Singh, G. Ctistis, S.R. Huisman, J.P. Korterik, A.P. Mosk, J.L. Herek, P.W.H. Pinkse

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2 Citations (Scopus)
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Abstract

We have measured the photonic bandstructure of GaAs photonic-crystal waveguides with high resolution in energy as well as in momentum using near-field scanning optical microscopy. Intriguingly, we observe additional bands that are not predicted by eigenmode solvers, as was recently demonstrated by Huisman et al. [Phys. Rev. B 86, 155154 (2012)]. We study the presence of these additional bands by performing measurements of these bands while varying the incident light power, revealing a non-linear power dependence. Here, we demonstrate experimentally and theoretically that the observed additional bands are caused by a waveguide-specific near-field tip effect not previously reported, which can significantly phase-modulate the detected field.
Original languageEnglish
Article number033104
Number of pages6
JournalJournal of Applied Physics
Volume117
Issue number3
Early online date20 Jan 2015
DOIs
Publication statusPublished - 21 Jan 2015

Keywords

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