Abstract

We propose a novel optical transformation to design an arbitrary $N$-sided regular polygonal rotator, which demonstrates that the inhomogeneity of a rotator can be completely removed, and only anisotropy is needed to rotate wavefronts without any perturbance. An $N$-sided regular polygonal rotator will give rise to a rotation angle of $360°/N$, thereby leading to a series of discrete rotation angles with different choices of $N$. Practical realization of such homogeneous rotators is suggested by using only four kinds of nonmagnetic isotropic dielectrics throughout. The dielectrics can be easily arranged in a planarly stratified configuration due to all the flat boundaries, which makes the rotator much easier in fabrication and application. Full-wave simulation validates the proposed scheme applicable to both passive object and active source with excellent performance.

© 2014 Optical Society of America

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