“School of Astronomy”
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| Paper IPM / Astronomy / 15964 |
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| Abstract: | |||||||
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Westudy the analogy between propagation of light rays in a stationary curved spacetime and in a
toroidal (meta-)material. After introducing a novel gravitational analog of the index of refraction of a
magneto-electric medium, it is argued that light rays not only feel a Lorentz-like force in a magnetoelectric
medium due to the non-vanishing curl of the toroidal moment, but also there exists an optical
analog of AharonovâBohm effect for the rays traveling in a region with a curl-free toroidal moment.
Experimental realization of this effect could utilize either a multiferroic material or a toroidal
metamaterial.
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