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所属单位：[1]电子科技大学,电子薄膜与集成器件国家重点实验室,成都610054;[2]电子科技大学,通信抗干扰技术国家级重点实验室,成都610054

发表刊物：Acta Physica Sinica

关键字：terahertz wave, metamaterials absorber, circular truncated cone, ultra-broadband

摘要：In this paper, we present an ultra-broadband polarization-independent terahertz （THz） metamaterial absorber （MA） made of circular truncated cone metamaterial. Absorptivity higher than 92.3% at normal incidence is obtained in a wide range of frequencies from 2 to 10 THz. We employ an isotropic metamaterial cell which consists of alternating layers of Au metal and SiO2 dielectric spacer. The absorption spectra of the THz MA are calculated using the finite-difference time domain （FDTD） method within the CST Microwave Studio 2009 in the frequency range of 0–10 THz. Our broadband absorber can be regarded as a group of micro-absorbers perpendicularly stacked and their absorption peaks coupling to each other to form an ultra broadband absorption. This THz MA has the advantages of broadband, polarization-independent and fabrication facility, and thus can be widely applied in THz wave harvesting, detection, spectrum imaging and stealthy technology.

文献类型：Article

卷号：62

期号：23

页面范围：237801-1-237801-7

ISSN号：1000-3290

是否译文：否

CN号：11-1958/O4