可调节温度的单向非互惠的石墨烯-VO2序列缺陷为基础的准光子太赫兹吸收器
Optics express
|July 30, 2025
概括
这项研究引入了使用二氧化瓦纳和石墨烯的可调节的太赫兹吸收器. 它为传感和能量收集的应用提供了对吸收的动态控制.
科学领域:
- 纳米光子和元材料
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- 特拉赫兹 (THz) 吸收器对于各种光子应用至关重要.
- 现有的THz吸收器往往缺乏可调性和多功能性.
- 换相材料和石墨烯为动态控制提供了潜力.
研究的目的:
- 开发一个可调和和多功能THz吸收器.
- 为了利用二氧化瓦纳 (VO2) 和石墨烯之间的协同作用.
- 在非周期性准光子结构中实现动态可控制的共振特征.
主要方法:
- 整合相位过渡VO2和可调节的石墨烯缺陷层.
- 使用无周期顺序的准光子结构.
- 采用热调制和化学潜能调,分别对VO2和石墨烯.
主要成果:
- 在4-6 THz范围内达到高质量的吸收峰值,显著的峰值为4.89 THz.
- 通过热和电气控制证明了强大的频谱调性.
- 获得了接近900的高质量因子 (Q-因子) 和一个大的横向Goos-Hänchen位移 (389λ).
- 对于单向的能量采集而言,表现出非互惠的吸收.
- 呈现出近乎完美的吸收率 (>99%),具有角稳定性和极化不敏感性.
结论:
- 设计的THz吸收器提供双调性 (热和电) 和缺陷工程.
- 该结构适用于THz热传感,红外探测和能量收集.
- 这项工作介绍了一类具有可适应框架的多功能纳米光子设备.
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