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2010 IEEE Photinic Society's 23rd Annual Meeting
In this work, we use a multi-heterodyne scanning near-field optical microscope to investigate the polarization and propagation of Bloch surface waves in an ultrathin ͑ϳ /10͒ ridge waveguide. First, we show that the structure sustains three surface modes, and demonstrate selective excitation of each. Then, by numerically processing the experimental data, we retrieve the transverse and longitudinal components of each of the modes, in good agreement with the calculated fields. Finally, we providedoi:10.1109/photonics.2010.5698953 fatcat:2l5krrdh6nce7agx5b7z6iso4a