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

Journal Article · Wed Jan 21 00:00:00 EST 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4906146· OSTI ID:22412950

Singh, A.; Huisman, S. R. ^[1]; Mosk, A. P.; Pinkse, P. W. H., ^[1]; Korterik, J. P.; Herek, J. L. ^[2]

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1. Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands)
2. Optical Sciences (OS), MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede (Netherlands)

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.

• OSTI ID: 22412950
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BAND THEORY
CRYSTALS
ELECTRONIC STRUCTURE
GALLIUM ARSENIDES
NONLINEAR PROBLEMS
RESOLUTION
SCANNING LIGHT MICROSCOPY
VISIBLE RADIATION
WAVEGUIDES