Dang Yu, Mu Yongheng, Qi Jiaran
Opt Express. 2020 Aug 17;28(17):24538-24549. doi: 10.1364/OE.399430.
Multiplexing metasurfaces have drawn great interest from the microwave to optical regimes. However, previous works often encounter the restriction of insufficient independence and deficient interference suppression among different channels. Herein, a metasurface platform featuring a dual-wavelength and dual-polarization multiplexing operation is proposed for highly decorrelated and completely independent manipulation of four frequency and polarization states. As illustrative examples, two paradigms of a multiplexing holographic metasurface in which four channels can respond independently without conjugate images are presented, and the measurement results not only validate the feasibility but also exhibit excellent imaging efficiency. The proposed metasurface may thus boost more complex and versatile multi-functional devices.
复用超表面已在从微波到光学波段引起了极大的关注。然而，以往的工作常常受到不同通道之间独立性不足和干扰抑制能力欠缺的限制。在此，提出了一种具有双波长和双偏振复用操作的超表面平台，用于对四个频率和偏振态进行高度去相关且完全独立的操控。作为示例，展示了两种复用全息超表面的范例，其中四个通道能够独立响应而无共轭图像，测量结果不仅验证了可行性，还展现出优异的成像效率。因此，所提出的超表面可能会推动更复杂、多功能的设备发展。
