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基于石墨烯元材料的等离子体诱导的太赫兹调制器用于高性能多频段过和慢光应用
Optics express
|April 4, 2024
概括
我们开发了基于石墨烯的先进的太赫兹 (THz) 调制器,提供可调节的频率和高性能. 这些调制器显著改善了THz应用的组延迟和灭绝比率.
科学领域:
- 光电学是指光电子产品.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 以往用于太赫兹 (THz) 范围的石墨烯元材料调制器存在低组延迟,灭绝比 (ER) 和难以调节的频率.
- 现有的THz等离子调节器通常需要进行频率调整的结构修改,从而限制了它们的多功能性.
研究的目的:
- 为THz范围提出和研究基于石墨烯 (Gr) 的高性能多层表面等离子体共振 (SPR) 调制器.
- 为了实现可调节的共振频率,增强的群体延迟和高ER,独立于结构参数.
主要方法:
- 使用有限差异时间域 (FDTD) 模拟技术进行全面调查.
- 基于多层石墨烯的设计的四带和五带等离子调制器.
主要成果:
- 实现调组延迟高达1.02ps (四带) 和1.41ps (五带),明显超过以前基于石墨烯的结构.
- 获得的最大ER为22.3dB,与现有报告相比大幅改善.
- 证明调节器对偏振角度的敏感性,允许从0°到180°调节传输率.
结论:
- 拟议的基于石墨烯的SPR调制器为THz应用提供了卓越的性能特性.
- 这些调制器具有广泛的调制性和高ER,克服了以前设计的局限性.
- 潜在的应用包括光学缓冲器,慢光装置,过器和集成光子电路.
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