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Nanopillar coupled periodic waveguides: from basic properties to applications

In this paper we review basic properties of nanopillar coupled periodic waveguides. A nanopillar coupled periodic waveguide consists of several rows of periodically placed dielectric cylinders. In such a waveguide, light confinement is due to the total internal reflection, while guided modes dispersion is strongly affected by waveguide periodicity. We present a systematic analysis of the dispersion and transmission efficiency of nanopillar coupled periodic waveguides and discusses their possible applications for integrated optics.