We demonstrate that an ultrathin ridge (< lambda/10) can guide Bloch surface waves in a dielectric multilayer. The propagation and polarization properties of the guided modes are investigated with a multi-heterodyne scanning near-field optical microscope.
Hans Peter Herzig, Myun Sik Kim, Maria-Pilar Bernal
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Tobias Kippenberg, Viacheslav Snigirev, Grigorii Likhachev