Plum E, Liu X-X, Fedotov V A, Chen Y, Tsai D P, Zheludev N I
Optoelectronics Research Centre, University of Southampton, SO17 1BJ, United Kingdom.
Phys Rev Lett. 2009 Mar 20;102(11):113902. doi: 10.1103/PhysRevLett.102.113902. Epub 2009 Mar 19.
We report that the classical phenomenon of optical activity, which is traditionally associated with chirality (helicity) of organic molecules, proteins, and inorganic structures, can be observed in artificial planar media which exhibit neither 3D nor 2D chirality. We observe the effect in the microwave and optical parts of the spectrum at oblique incidence to regular arrays of nonchiral subwavelength metamolecules in the form of strong circular dichroism and birefringence indistinguishable from those of chiral three-dimensional media.
我们报告称，传统上与有机分子、蛋白质和无机结构的手性（螺旋性）相关的光学活性这一经典现象，能够在既不呈现三维也不呈现二维手性的人工平面介质中被观察到。我们在光谱的微波和光学波段，以斜入射到非手性亚波长超分子规则阵列上的方式，观察到了这种效应，其表现为强烈的圆二色性和双折射，与手性三维介质中的现象难以区分。
