Experimental demonstration of polarization and direction insensitive metamaterial analog of electromagnetically induced transparency by bright-bright mode coupling

oleh: Yongqiang Kang, Haoyan Xi, Tianhua Meng, Qiaowen Lin, Lijuan Dong

Format: Article
Diterbitkan: Elsevier 2022-06-01

Deskripsi

We numerically and experimentally demonstrate an electromagnetically induced transparency analogue (EIT-analogue) planar metamaterial. The proposed metamaterial cell adopts a double patterned concentric hexagon ring and can be manufactured easily. The bandwidth of the transmission window can be tuned by changing the separation distance of two hexagon ring. The coupling mechanism of the EIT-analogue metamaterial is studied by analyzing transmission response and magnetic field distribution. The achievement of EIT-analogue effect in this system is two bright modes coupling, which is different from bright-dark modes coupling. A polarization-independent and angle-insensitive sharp transmission response is obtained at microwave frequencies. A coupled oscillator theoretical model is used to demonstrate the resonance transmittance mechanism of the proposed EIT-analogue metamaterial.