Velocity control of electromagnetic waves using metamaterials and its applications

利用亚波长人工原子组装的超材料实现了电磁感应透明（EIT），并研究了控制EIT特性的方法。在微波区，实现了通过入射角控制传输延迟的方法和通过外加电压控制EIT特性的方法。作为后一种方法的应用，我们展示了超材料中脉冲的存储和检索。我们还实现了有效的频率混合使用EIT超材料与非线性元件。

We realized electromagnetically induced transparency (EIT) using metamaterial, which is an assembly of subwavelength artificial atoms, and investigated methods to control EIT properties. In microwave regions, we realized a method to control the propagation delay by the incident angle and a method to control the EIT properties by applied voltages. As an application of the latter method, we demonstrated storage and retrieval of a pulse in the metamaterial. We also achieved efficient frequency mixing using EIT metamaterial with nonlinear elements.