基于二氧化钒多重耦合对角切片方形环形结构的可调宽带太赫兹频率吸收器

IF 2.5 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2023-11-23 DOI:10.1016/j.photonics.2023.101211
Pankaj Binda , Sagnik Banerjee , Rajendra Mitharwal , Sarita Nanda
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引用次数: 0

摘要

提出了一种以二氧化钒为材料,在太赫兹频率下具有多个耦合对角切片方形环的宽带吸收器。该结构在2.85 ~ 7.51 THz频率范围内具有90%以上的吸收率,相对带宽为89.96%,吸收带宽为4.66 THz。当二氧化钒的电导率从200s /m增加到200s /m时,吸收曲线增加,在3.4 THz下可调范围从1.62%到100%。由于其几何对称性,该结构在平面波入射下与偏振角无关。该结构适用于斜入射平面波的横向电模式和横向磁模式的不同入射角。结果表明,在相同的频带内,与最先进的设计相比,宽频带具有在太赫兹范围内的传感器、开关、调谐和调制方面的潜在应用。
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Adjustable broadband absorber based on vanadium dioxide multiple coupled diagonally sliced square ring shaped structure for THz frequency

A broadband absorber with multiple coupled diagonally sliced square rings at terahertz frequency using vanadium dioxide is proposed. The proposed structure exhibits more than 90 % absorption in the frequency range of 2.85–7.51 THz, with a relative bandwidth of 89.96 % and an absorption bandwidth of 4.66 THz. The absorptivity curve increases as vanadium dioxide conductivity rises from 200 S/m to 200,000 S/m, giving a wide range of tunability from 1.62 % to 100 % at 3.4 THz. Due to its geometrical symmetry, the proposed structure is independent of the polarization angle under normal incident plane waves. The proposed structure works for different incident angles for transverse electric (TE) mode and transverse magnetic (TM) mode with oblique incidence plane waves. The results demonstrate the broad bandwidth compared to the state-of-the-art designs within the same frequency band with potential applications in sensors, switches, tuning, and modulation in the terahertz range.

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来源期刊
CiteScore
5.00
自引率
3.70%
发文量
77
审稿时长
62 days
期刊介绍: This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.
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