Nonreciprocal diffraction of light on a planar chiral structure

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  • 25 September 2003
Abstract
We show that in spite of common beliefs, light polarization rotation non-reciprocity may be achieved in a non-magnetic structure. Waves diffracted on a regular planar chiral array show different polarization eigenstates in the direct and reversed diffraction scenarios. If the diffracted light wave is reflected straight back towards the planar chiral structure by a mirror and then diffracts again, the polarization azimuth of the returning wave is different from the incident light by tenths of a degree, resembling the famous nonreciprocity of the Faraday effect. The effect is compatible with the Lorenz lemma, while both structural chirality of the array arrangement and the chirality of individual elements of the array give rise to polarization nonreciprocity.

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