arXiv 1802.063742018-02-18quant-phphysics.optics

量子超材料：单光子自旋和轨道angular momentum的纠缠

Quantum metamaterials: entanglement of spin and orbital angular momentum of a single photon

Tomer Stav, Arkady Faerman, Elhanan Maguid, Dikla Oren, Vladimir Kleiner, Erez Hasman, Mordechai Segev

摘要：

超材料已经成为一个主要的研究领域超过二十年了，涉及人工结构与预先设计的电磁性能构建深亚波长积木。它们已经被用来展示大量迷人的现象，从负折射率和ε接近于零到隐形，广义相对论效应的模拟和超分辨率成像，仅举几例。在过去的几年里，超材料被认为是量子光学的一个新平台，并且已经用单光子进行了一些开创性的实验。在这里，我们采用了一种介电超颖表面来产生单光子的自旋和轨道角动量之间的纠缠。我们利用光子自旋轨道相互作用产生的几何相位，在实验上证明了四个Bell态的产生。这是第一次用超颖表面进行纠缠态实验，因此它们为量子超颖材料的新领域铺平了道路。

英文摘要：

Metamaterials have been a major research area for more than two decades now, involving artificial structures with predesigned electromagnetic properties constructed from deep subwavelength building blocks. They have been used to demonstrate a wealth of fascinating phenomena ranging from negative refractive index and epsilon-near-zero to cloaking, emulations of general relativity effects, and super-resolution imaging, to name a few. In the past few years, metamaterials have been suggested as a new platform for quantum optics, and several pioneering experiments have already been carried out with single photons. Here, we employ a dielectric metasurface to generate entanglement between spin and orbital angular momentum of single photons. We demonstrate experimentally the generation of the four Bell states by utilizing the geometric phase arising from the photonic spin-orbit interaction. These are the first experiments with entangled states with metasurfaces, and as such they are paving the way to the new area of quantum metamaterials.

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摘要：

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