Beam Manipulations With Compact Planar Dielectric Pancharatnam–Berry Phase Devices
Beam Manipulations With Compact Planar Dielectric Pancharatnam–Berry Phase Devices
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DOI：
10.3389/fphy.2022.894703
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发表时间：
2022-05
期刊：
影响因子：
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通讯作者：
Yachao Liu;Guo Ping Wang
中科院分区：
文献类型：
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作者：
Yachao Liu;Guo Ping Wang
近年来，人工材料设计和纳米加工技术的快速发展，极大地促进了新型平面光学器件的迅猛发展。传统的光学位相梯度器件由于受到光程差的限制而无法缩小到亚波长尺寸，因此迫切需要新的策略来设计紧凑的平面器件。在这里，我们开发了一系列新颖的紧凑型平面器件，通过利用Pancharatnam-Berry相的可叠加、偏振相关的特性来打破厚度限制。其中，具有代表性的紧凑型器件是用精心设计的介电玻璃板制造的。因此，我们的紧凑型器件提供了一种新颖而简单的方案来避免相位梯度器件级联系统中传输损耗的累积。
The growth spurt of novel planar optical devices in recent years has been greatly facilitated by the rapid development of artificial material designing and nanoprocessing technology. Traditional optical phase gradient devices cannot be scaled down to sub-wavelength size due to the confinement of the optical path difference required for versatile phase manipulation, so new strategies are urgently needed to design compact planar devices. Here, we develop a series of novel compact planar devices that break the thickness limitation by taking advantage of the superpositionable, polarization-dependent properties of the Pancharatnam–Berry phase. Among them, representative compact devices are fabricated using well-designed dielectric glass plates. Our compact devices therefore offer a novel and simple scheme to circumvent the accumulation of transmission loss in a cascade system of phase gradient devices.