极化(电化学)
光学
物理
电介质
偏振旋转器
太赫兹辐射
径向极化
光子学
光电子学
双折射
激光器
激光束
激光束质量
化学
物理化学
作者
Susu Hu,Wei Li,Yan Liu,Shaoqi Huang,Bo Dai,Liang Qiu,Songlin Zhuang,Dawei Zhang
出处
期刊:Optics Express
[The Optical Society]
日期:2024-02-12
卷期号:32 (5): 6963-6963
摘要
Polarization modulation of electromagnetic waves plays an important role in the field of optics and optoelectronics. Current polarization optics are typically limited to the modulation in a single transverse plane. However, manipulating polarization along the longitudinal direction is also important for full-space polarization modulation. Here, we propose two kinds of all-dielectric terahertz metasurfaces for longitudinally spatial polarization manipulation. The metasurfaces are capable of controlling polarization along the propagation path, namely: i) a longitudinal bifocal metalens with different polarization states at each focal point, and ii) a versatile metalens can simultaneously generate a uniformly polarized focused beam and a vector beam with varying polarization along the propagation path. Furthermore, the measurement of the dielectric thickness is demonstrated based on the polarization modulation feature of the metalens. The proposed metasurfaces allow for effective polarization state alteration along the propagation path, exhibiting significant potential for applications in versatile light-matter interactions, optical communications, and quantum optics.
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