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Manipulating Bloch surface waves in 2D: a platform concept-based flat lens

Light(Science & Applications) 2014年第1期3卷 370-376页

作者： Libo Yu Elsie Barakat Tristan Sfez Lubos Hvozdara Joab Di Francesco Hans Peter Herzig optics&Phatonics Technology Laboratory(OPT) Ecole Polytechinique Federale de Lausanne(EPFL)CH-2000 NeuchatelSwitzerland

At the end of the 1970s,it was confirmed that dielectric multilayers can sustain Bloch surface waves(BSWs).However,BSWs were not widely studied until more *** advantage of their high-quality factor,sensing applications have focused on *** far,no work has been performed to manipulate and control the natural surface propagations in terms of defined functions with two-dimensional(2D)components,targeting the realization of a 2D *** this study,we demonstrate that 2D photonic components can be implemented by coating an in-plane shaped ultrathin(l/15)polymer layer on the dielectric *** presence of the polymer modifies the local effective refractive index,enabling direct manipulation of the *** locally shaping the geometries of the 2D components,the BSW can be deflected,diffracted,focused and coupled with 2D *** BSW manipulation in 2D,the dielectric multilayer can play a new role as a robust platform for 2D optics,which can pave the way for integration in photonic *** near-field measurements are used to study light propagation through micro-and nano-optical *** demonstrate that a lens-shaped polymer layer can be considered as a 2D component based on the agreement between near-field measurements and theoretical *** the focal shift and the resolution of a 2D BSW lens are measured for the first *** proposed platform enables the design of 2D all-optical integrated systems,which have numerous potential applications,including molecular sensing and photonic circuits.

关键词： Bloch surface wave 2D optics manipulation micro-and nano-optics nanophotonics platform

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