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arXiv · 1110.5539

Extraction of optical Bloch modes in a photonic-crystal waveguide

S. R. Huisman·G. Ctistis·S. Stobbe·J. L. Herek·P. Lodahl·W. L. Vos·P. W. H. Pinkse
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Abstract

We perform phase-sensitive near-field scanning optical microscopy on photonic-crystal waveguides. The observed intricate field patterns are analyzed by spatial Fourier transformations, revealing several guided TE- and TM-like modes. Using the reconstruction algorithm proposed by Ha, et al. (Opt. Lett. 34 (2009)), we decompose the measured two-dimensional field pattern in a superposition of propagating Bloch modes. This opens new possibilities to study specific modes in near-field measurements. We apply the method to study the transverse behavior of a guided TE-like mode, where the mode extends deeper in the surrounding photonic crystal when the band edge is approached.

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S. R. Huisman, G. Ctistis, S. Stobbe, J. L. Herek, P. Lodahl, W. L. Vos, P. W. H. Pinkse. 2012-01-04. Extraction of optical Bloch modes in a photonic-crystal waveguide. https://doi.org/10.1063/1.3682105

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