石墨烯
太赫兹辐射
光学
各向同性
流离失所(心理学)
材料科学
电介质
折射率
吸收(声学)
功能(生物学)
和大门
光电子学
逻辑门
物理
纳米技术
数学
算法
生物
进化生物学
心理学
心理治疗师
作者
Junyang Sui,Siyuan Liao,Rui-Yang Dong,Haifeng Zhang
标识
DOI:10.1002/andp.202200661
摘要
Abstract A layered metastructure (LM) formed by a quasi‐periodic arrangement of graphene and isotropic dielectric mediums, which can realize the functions of the tunable logic gate and refractive index (RI) sensing based on spin Hall effect (SHE), is theoretically studied. The asymmetric arrangement of the mediums and the increased angle of the incident electromagnetic waves (EWs) equip the LM with Janus feature. Through the modulation of the graphene chemical potential, the sharp absorption peak (AP) in the terahertz (THz) range can be obtained, and then the AP can be used to implement NOT logic and OR logic respectively corresponding to the forward and backward scales. By locating the incident angle of light corresponding to the SHE displacement peak, the linear measurement relationship between RI and SHE angle can be realized, and the widest RI measurement range is 1–1.4 with the angles changing from 21.88° to 61.84°. Additionally, a good linear range can be achieved, owning the optimum sensitivity ( S ) up to 153.5° RIU −1 . The RI sensing still strictly follows the logic functions of the forward NOT and backward OR via adjusting the chemical potential of graphene and discriminating the peak value of SHE displacement.
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