Terahertz Perfect Absorber Based on Asymmetric Open-Loop Cross-Dipole Structure

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（6）
• 页码范围: 94-97
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/6/067801

摘要

Equipped with multiple and unique features,a terahertz absorber exhibits great potential for use in the development of communication,military,and other fields where achieving perfect broadband absorption has always been a challenge.We present a metamaterial terahertz (THz) absorber comprising a cross-dipole patch,four symmetric square patches and an asymmetric open-loop patch with a good perfect absorption rate for TE and TM polarizations.The average absorption of more than 96％ occurs in the frequency range from 2.4 THz to 3.8 THz,in which the absorptance peak can reach 99.9％,as indicated by simulated results.Our design has broad potential applications in THz couplers,as well as in fields like biology and security.