Scholarlink

<p>Terahertz communication systems demand versatile devices capable of simultaneously controlling propagating waves and surface plasmon polaritons (SPPs) in far-field (FF) and near-field (NF) channels, yet existing solutions are constrained by volatile operation, single-function limitations, and the inability to integrate NF and FF functionalities. Here, we present a nonvolatile reconfigurable terahertz metasurface platform leveraging the phase-change material Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub>(GST) to achieve on-demand dual-channel modulation—a first in the terahertz regime. By exploiting the stark conductivity contrast of GST between amorphous and crystalline states, our design enables energy-efficient switching between NF-SPP manipulation and FF-wavefront engineering without requiring continuous power input. Experimental validation demonstrates two devices: Device I dynamically transitions between NF SPP focusing and FF vortex beam generation, while Device II toggles NF anomalous SPP focusing and FF holographic imaging. The metasurface uniquely integrates simultaneous amplitude/phase control for SPPs and free-space waves, overcoming the single-channel limitations of prior works. With reversible switching cycles and nonvolatile state retention (&gt;10 years), this platform bridges the gap between on-chip plasmonics and free-space terahertz technologies, offering transformative potential for applications in 6 G communication, encrypted data storage, and multifunctional metasensors.</p><p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dynamic dual-mode terahertz device with nonvolatile switching for integrated on-chip and free-space applications

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月8日

查看全文
  • Yisheng Dong,
  • Xieyu Chen,
  • Shoujun Zhang,
  • Zhihao Wang,
  • Hongyi Li,
  • Kuan Liu,
  • Guanghong Xu,
  • Quan Xu,
  • Quan Li,
  • Chunmei Ouyang,
  • Tun Cao,
  • Zhen Tian

摘要

Terahertz communication systems demand versatile devices capable of simultaneously controlling propagating waves and surface plasmon polaritons (SPPs) in far-field (FF) and near-field (NF) channels, yet existing solutions are constrained by volatile operation, single-function limitations, and the inability to integrate NF and FF functionalities. Here, we present a nonvolatile reconfigurable terahertz metasurface platform leveraging the phase-change material Ge2Sb2Te5(GST) to achieve on-demand dual-channel modulation—a first in the terahertz regime. By exploiting the stark conductivity contrast of GST between amorphous and crystalline states, our design enables energy-efficient switching between NF-SPP manipulation and FF-wavefront engineering without requiring continuous power input. Experimental validation demonstrates two devices: Device I dynamically transitions between NF SPP focusing and FF vortex beam generation, while Device II toggles NF anomalous SPP focusing and FF holographic imaging. The metasurface uniquely integrates simultaneous amplitude/phase control for SPPs and free-space waves, overcoming the single-channel limitations of prior works. With reversible switching cycles and nonvolatile state retention (>10 years), this platform bridges the gap between on-chip plasmonics and free-space terahertz technologies, offering transformative potential for applications in 6 G communication, encrypted data storage, and multifunctional metasensors.