Balthasar Mueller J P, Rubin Noah A, Devlin Robert C, Groever Benedikt, Capasso Federico
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2017 Mar 17;118(11):113901. doi: 10.1103/PhysRevLett.118.113901. Epub 2017 Mar 14.
We present a method allowing for the imposition of two independent and arbitrary phase profiles on any pair of orthogonal states of polarization-linear, circular, or elliptical-relying only on simple, linearly birefringent wave plate elements arranged into metasurfaces. This stands in contrast to previous designs which could only address orthogonal linear, and to a limited extent, circular polarizations. Using this approach, we demonstrate chiral holograms characterized by fully independent far fields for each circular polarization and elliptical polarization beam splitters, both in the visible. This approach significantly expands the scope of metasurface polarization optics.
我们提出了一种方法，该方法仅依靠排列成超表面的简单线性双折射波片元件，就能在任意一对正交偏振态（线性、圆偏振或椭圆偏振）上施加两个独立且任意的相位分布。这与之前的设计形成对比，之前的设计只能处理正交线性偏振，并且在有限程度上处理圆偏振。利用这种方法，我们展示了手性全息图，其特征在于每种圆偏振和椭圆偏振分束器在可见光下都具有完全独立的远场。这种方法显著扩展了超表面偏振光学的范围。
