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

A. Singh, Georgios Ctistis, S.R. Huisman, Jeroen P. Korterik, Allard Mosk, Jennifer Lynn Herek, Pepijn Willemszoon Harry Pinkse

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

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
Pages (from-to)033104-033104-6
Number of pages6
JournalJournal of Applied Physics
Volume117
Issue number3
DOIs
Publication statusPublished - 2015

Keywords

  • IR-98346
  • METIS-313473

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