黑磷
太赫兹辐射
石墨烯
光电子学
材料科学
对偶(语法数字)
磷
太赫兹超材料
纳米技术
光学
物理
远红外激光器
艺术
激光器
文学类
冶金
作者
Zhe Chen,Zhong‐Hua Chen,Haowen Tang,Tao Shen,Hui Zhang
标识
DOI:10.1016/j.optmat.2024.115065
摘要
This paper proposes a dual-tunable and high-efficiency terahertz (THz) device based on black phosphorus (BP) and graphene metasurface with four functions, including broadband absorption, narrowband absorption, linear dichroism (LD) and electromagnetically induced transparency (EIT). Dynamic tunability is achieved by adjusting the carrier density of BP, the chemical potential of graphene and the conductivity of vanadium dioxide (VO2). When VO2 is in the metallic state, the device can work as a broadband absorber in the range of 1.18–3.49 THz with absorption rate above 90% and the relative bandwidth of 98.9%. The device also has a narrowband absorption function with an absorption rate of 99.9% at 4.19 THz. Additionally, the device can achieve LD function at frequencies of 4.6 THz and 3.81 THz, with peak LD values of 0.95 and −0.90, respectively. When VO2 is in the insulating state, the device shows an EIT function with a highly transparent window at 4.68 THz. It is worth noting that all functions are switchable and the operating frequencies are adjustable. The dual-tunable multifunctional device may have great potential in miniaturized THz systems.
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