光学
圆极化
极化(电化学)
物理
角动量
几何相位
电介质
太赫兹辐射
折射率
波前
宽带
红外线的
旋涡
光电子学
材料科学
梁(结构)
凝聚态物理
物理化学
微带线
量子力学
化学
作者
Jinglin He,Zhuolin Shi,S. Ye,Minhua Li,Jianfeng Dong
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2022-08-23
卷期号:30 (19): 34809-34809
被引量:6
摘要
In this paper, a reconfigurable all-dielectric metasurface based on Ge2Sb2Se4Te1 (GSST) phase-change material is proposed. By changing GSST from amorphous state to crystalline state, the metasurface can achieve high circular dichroism (CD) and wideband polarization conversion for circularly polarized waves in the mid-infrared (MIR) band. The maximum CD value reaches 0.95 at 74 THz, and circular polarization conversion efficiency is more than 90% in the wideband range of 41 THz - 48 THz. In addition, based on Pancharatnam-Berry phase, three kinds of wavefront manipulation of light have been realized: abnormal refraction, orbital angular momentum vortex beam and orbital angular momentum vortex beam splitting. This work has potential applications in the future MIR optical integrated system.
科研通智能强力驱动
Strongly Powered by AbleSci AI