Tunable fano-like resonances in graphene metasurface for quad-frequency optoelectronic sensing

IF 2.9 3区物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2025-01-09 DOI:10.1016/j.physe.2025.116191

Mingfei Wang , Wei Cui , Yixuan Wang , Mengyao Li , Xin Qie

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Abstract

To address the increasing demands in optoelectronic sensing technologies, we propose a novel patterned graphene-based metasurface with tunable electromagnetic properties, tailored for advanced sensing applications. Finite-Difference Time-Domain (FDTD) simulations are employed to design and analyze the metasurface under terahertz excitation, enabling the modulation of double and triple Fano-like resonances by adjusting structural parameters, Fermi levels, and carrier mobility. Bright-dark mode theory and electric field distribution analyses provide insights into the underlying resonance mechanisms. Furthermore, the metasurface demonstrates high sensitivity in cholesterol concentration detection, achieving a maximum sensitivity of 1.8424 THz/RIU and a figure of merit (FOM) of 44.27. Notably, the graphene metasurface supports quad-frequency sensing, showcasing its potential for precise environmental monitoring and tunable optoelectronic device applications.

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用于四频光电传感的石墨烯超表面可调谐类fano共振

为了满足光电传感技术日益增长的需求，我们提出了一种新型的基于石墨烯的图像化超表面，具有可调谐的电磁特性，为先进的传感应用量身定制。利用时域有限差分（FDTD）模拟设计和分析了太赫兹激励下的超表面，通过调整结构参数、费米能级和载流子迁移率，实现了双和三类法诺共振的调制。明暗模式理论和电场分布分析提供了对潜在共振机制的见解。此外，超表面在胆固醇浓度检测中表现出很高的灵敏度，最大灵敏度为1.8424 THz/RIU，优点系数（FOM）为44.27。值得注意的是，石墨烯超表面支持四频传感，展示了其在精确环境监测和可调谐光电器件应用方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica E-low-dimensional Systems & Nanostructures 物理-纳米科技

CiteScore

7.30

自引率

6.10%

发文量

356

审稿时长

65 days

期刊介绍： Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures