具有非挥发性切换的动态双模特拉赫兹装置,用于集成的芯片内和自由空间应用
Yisheng Dong1, Xieyu Chen1, Shoujun Zhang1
1Center for Terahertz Waves, College of Precision Instrument and Optoelectronics Engineering, and the Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), Tianjin University, Tianjin, 300072, China.
这项研究引入了一种新的太赫兹超表面,使用相变材料来对近场和远场太赫兹波进行非挥发性控制. 这一突破使得双通道调制能够用于先进的通信和传感应用.
科学领域:
- 光子学和元材料研究
- 特拉赫兹技术的技术.
- 塑制剂的使用方法
背景情况:
- 太赫兹 (THz) 通信系统需要设备来同时控制近场 (NF) 的表面等离子极子 (SPP) 和远场 (FF) 的传播波.
- 现有的THz设备存在不稳定的操作,功能有限,无法集成NF和FF控制.
研究的目的:
- 开发一种非挥发性,可重新配置的THz超表面平台,用于按需的双通道调制.
- 克服单一功能设备的局限性,并集成NF和FF功能.
主要方法:
- 利用相变材料Ge2Sb2Te5 (GST) 和其独特的导电状态 (无形和晶体) 来切换功能.
- 设计和实验验证了两个设备,展示了NF SPP操纵和FF波面工程之间的动态过渡.
主要成果:
- 在NF SPP聚焦/异常聚焦和FF束生成/全息成像之间实现了节能,非挥发性的切换.
- 证明了SPP和自由空间波的同时振幅和相位控制.
- 已验证的非挥发性状态保留时间超过10年.
结论:
- 开发的基于GST的超表面平台在THz模式下实现了前所未有的双通道调制.
- 这项技术跨越了芯片上的等离子体和自由空间THz系统.
- 为6G通信,安全数据存储和多功能元传感器提供了变革性的潜力.
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