响应刺激的低频特拉赫兹吸收 开启-关闭 旋转交叉材料中的可切换性
Guanping Li1,2, Olaf Stefanczyk1, Kunal Kumar1
1Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Advanced materials (Deerfield Beach, Fla.)
|June 25, 2025
概括
这项研究引入了一种新的旋转交叉材料,可以在高旋转和低旋转状态之间切换. 这种材料可逆调节太赫兹光吸收,为新型电子设备铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 化学 化学 化学
背景情况:
- 旋转交叉 (SCO) 材料对于传感器和电子设备至关重要.
- 它们在太赫兹 (THz) 区域的应用尚未得到充分探索.
- 可切换材料为高级功能提供了潜力.
研究的目的:
- 为THz应用设计和研究一种新的1D SCO网络.
- 探索材料的热和光学切换行为.
- 了解SCO,THz属性和外部刺激之间的关系.
主要方法:
- 一个独特的1D SCO网络的合成: {[FeII(4-烯) ][HgII(μ-SCN) ]2}n.
- 温度依赖的晶体学,磁性和THz吸收光谱学.
- 光诱导激发自旋状态捕获 (LIESST) 效应研究.
- 第一个原则计算和光晶体分析.
主要成果:
- 观察到一个突然的SCO现象,在高旋转 (HS) 和低旋转 (LS) 状态之间进行过渡.
- 冷却速度影响了旋转状态过渡的完整性.
- 可见光或近红外光诱导了光诱导激发自旋状态捕获 (LIESST) 效应,将LS转换为转移稳定的HS状态.
- 在特定频率 (例如0.82和1.37 THz) 上,温度和光都可逆调节THz吸收率.
结论:
- 设计的SCO网络显示了THz吸收的可逆热和光学切换.
- 这项工作增强了对用于THz应用的SCO材料中的结构属性关系的理解.
- 这些发现对于开发基于可切换材料的未来THz设备至关重要.
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