Wednesday, January 30, 2013

1301.6954 (Yong-Liang Zhang et al.)

Twisting Electromagnetic Fields with Singular Transformation Optics    [PDF]

Yong-Liang Zhang, Li-Na Shi, Xian-Zi Dong, Zhen-Sheng Zhao, Xuan-Ming Duan
Transformation optics is a powerful method for manipulating the electromagnetic fields with metamaterials which resembles a optical Riemannian space for photons. Analogous to the theory of topological defects, we propose a geometric extension of transformation optics by introduction of linear topological defect which produces spatial torsion. In order to illustrate the optical effect of singular transformation optics, we present an example of application to control the twisting degree of freedom of light, the orbital and spin angular momentum of light with an optical cosmic string. Our results provide a systematic and versatile framework which may open intriguing venues in angular momentum engineering of light with artificial metamaterials.
View original: http://arxiv.org/abs/1301.6954

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