相位板
光学
太赫兹辐射
锗
材料科学
二氧化二钒
光电子学
旋光法
极化(电化学)
激光器
物理
纳米技术
散射
硅
薄膜
物理化学
化学
作者
Lingli Ba,Quanlong Yang,Jing Wang,Yapeng Dou,Fan Wu,Junliang Yang
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-08-12
卷期号:49 (18): 5075-5075
摘要
Active control of polarization using metasurfaces is crucial in terahertz optics, offering promising advancements in sensing, imaging, and telecommunications. Here, we developed reconfigurable terahertz multifunctional wave plates by leveraging vanadium dioxide/germanium hybrid metasurfaces. This approach allows for mutual role changing of metasurface among quarter-wave plate, half-wave plate, and full-wave plate, facilitated by the introduction of continuous-wave and pulse lasers. The photoinduced phase change of vanadium dioxide, along with the bridging control of germanium, plays a key role in the transition of multifunctional wave plates. Also, the analysis of polarization conversion ratio, ellipticity, and underlying physics demonstrates the ability of multifunctional wave plates. These discoveries deliver valuable insight into advanced polarization control and demonstrate the potential for innovative active-control devices.
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