Quantum cooperative helical metafilms for producing nonclassical light (C05)

研究了螺旋金属薄膜线性和非线性光学响应中的量子协同效应。通过对元薄膜进行工程化，我们的目标是获得高的二阶非线性极化率。这种磁化率将被用来通过自发的参数下转换产生纠缠光子对。通过空间调制超薄膜的性质，我们将定制光子对的纠缠，包括轨道角动量(OAM)纠缠。

We study the quantum cooperative effects in the linear and nonlinear optical response of helical metafilms. By engineering the metafilms, we aim to achieve high values of the second-order nonlinear susceptibility. This susceptibility will be used to generate pairs of entangled photons through spontaneous parametric down-conversion. By spatially modulating the metafilm properties, we will tailor the entanglement of photon pairs, including orbital angular momentum (OAM) entanglement.