偏振器
光学
偏振旋转器
双折射
全息术
物理
极化(电化学)
雷
圆极化
径向极化
光电子学
激光器
激光束
激光束质量
微带线
物理化学
化学
作者
Ahmed H. Dorrah,Noah A. Rubin,Aun Zaidi,Michele Tamagnone,Federico Capasso
出处
期刊:Nature Photonics
[Springer Nature]
日期:2021-01-28
卷期号:15 (4): 287-296
被引量:203
标识
DOI:10.1038/s41566-020-00750-2
摘要
Polarization plays a key role in science; hence its versatile manipulation is crucial. Existing polarization optics, however, can only manipulate polarization in a single transverse plane. Here we demonstrate a new class of polarizers and wave plates—based on metasurfaces—that can impart an arbitrarily chosen polarization response along the propagation direction, regardless of the incident polarization. The underlying mechanism relies on transforming an incident waveform into an ensemble of pencil-like beams with different polarization states that beat along the optical axis thereby changing the resulting polarization at will, locally, as light propagates. Remarkably, using form-birefringent metasurfaces in combination with matrix-based holography enables the desired propagation-dependent polarization response to be enacted without a priori knowledge of the incident polarization—a behaviour that would require three polarization-sensitive holograms if implemented otherwise. Our work expands the use of polarization in the design of multifunctional metasurfaces and may find application in tunable structured light, optically switchable devices and versatile light–matter interactions. Using a metasurface that allows shaping of the polarization state of a light beam independently at each point of space along its propagation direction, longitudinally variable polarization optical components are demonstrated, inspiring new directions in structured light, polarization-switchable devices and light–matter interaction.
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