论文标题
具有复合元磁的无损，复杂值的光场控制
Lossless, Complex-Valued Optical Field Control with Compound Metaoptics
论文作者
论文摘要
从给定来源形成所需的光场分布需要精确的空间控制场的振幅和相位。在过去的几年中，已经证明了允许对光场极端相位和极化控制的低损失跨度。然而，提供振幅控制的跨境仍然存在损失，利用诸如反射，吸收或极化损失等机制来控制振幅。在这里，我们通过使用两个距离隔开的无损相位偏移，描述了光场对光场的幅度和相操作。我们首先使用这种方法证明了组合的梁形成剂和分离器光学组件。接下来，我们显示高质量的计算机生成的三维全息图。拟议的元平台结合了无损，复杂值的场控制和物理上较小的厚度的优势。这种方法可能导致低调的三维全息显示，紧凑的光学组件和用于微粒操作的高精度光镊。
Forming a desired optical field distribution from a given source requires precise spatial control of a field's amplitude and phase. Low-loss metasurfaces that allow extreme phase and polarization control of optical fields have been demonstrated over the past few years. However, metasurfaces that provide amplitude control have remained lossy, utilizing mechanisms such as reflection, absorption, or polarization loss to control amplitude. Here, we describe the amplitude and phase manipulation of optical fields without loss, by using two lossless phase-only metasurfaces separated by a distance. We first demonstrate a combined beam-former and splitter optical component using this approach. Next, we show a high-quality computer-generated three-dimensional hologram. The proposed metaoptic platform combines the advantage of lossless, complex-valued field control with a physically small thickness. This approach could lead to low-profile, three-dimensional holographic displays, compact optical components, and high precision optical tweezers for micro-particle manipulation.
