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Opt Express. 2012 Jun 4;20(12):13006-13. doi: 10.1364/OE.20.013006.

Transformation bending device emulated by graded-index waveguide.

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1
Department of Physics, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.

Abstract

We demonstrate that a transformation device can be emulated using a gradient-index waveguide. The effective index of the waveguide is spatially varied by tailoring a gradient thickness dielectric waveguide. Based on this technology, we demonstrate a transformation device guiding visible light around a sharp corner, with low scattering loss and reflection loss. The experimental results are in good agreement with the numerical results.

PMID:
22714328
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