论文标题
非线性天线中的超散射，超级吸附和非记录
Superscattering, Superabsorption, and Nonreciprocity in Nonlinear Antennas
论文作者
论文摘要
我们建议基于具有较大光学非线性的Epsilon-Near-Zero材料的可调非线性天线。我们表明，天线的吸收和散射横截面可以通过改变激光束的强度，从几乎超级造型器到几乎超级吸光器进行动态控制。 Moreover, we demonstrate that a hybrid nonlinear antenna, composed of epsilon-near-zero and high-index dielectric materials, exhibits nonreciprocal radiation patterns because of broken spatial inversion symmetry and large optical nonlinearity of the epsilon-near-zero material.通过更改激光的强度，可以在双向和单向发射中调用天线的辐射模式，称为Huygens源。我们的研究为超材材料的超快动力控制提供了一种新颖的方法，用于梁转向和光学限制。
We propose tunable nonlinear antennas based on an epsilon-near-zero material with a large optical nonlinearity. We show that the absorption and scattering cross sections of the antennas can be controlled dynamically from a nearly superscatterer to a nearly superabsorber by changing the intensity of the laser beam. Moreover, we demonstrate that a hybrid nonlinear antenna, composed of epsilon-near-zero and high-index dielectric materials, exhibits nonreciprocal radiation patterns because of broken spatial inversion symmetry and large optical nonlinearity of the epsilon-near-zero material. By changing the intensity of the laser, the radiation pattern of the antenna can be tuned between a bidirectional and a unidirectional emission known as a Huygens source. Our study provides a novel approach toward ultrafast dynamical control of metamaterials, for applications such as beam steering and optical limiting.
