Dual-channel geometric meta-holograms with complex-amplitude modulation based on bi-spectral single-substrate-layer meta-atoms

被引：6

作者：

Xie, Rensheng ^{[1
]}

Bai, Xudong ^{[2
]}

Liu, Ji ^{[3
]}

Wang, Xiong ^{[3
]}

Zheng, Yinuo ^{[3
]}

Gu, Zhen ^{[1
]}

Zhang, Hualiang ^{[4
]}

Jing, Chengbin ^{[1
]}

Ding, Jun ^{[1
]}

Chu, Junhao ^{[1
]}

机构：

[1] East China Normal Univ, Sch Phys & Elect Sci, State Key Lab Precis Spect, Key Lab Polar Mat & Devices, Shanghai 200241, Peoples R China

[2] Northwestern Polytech Univ, Sch Microelect, Xian 710129, Peoples R China

[3] ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China

[4] Univ Massachusetts, Dept Elect & Comp Engn, Lowell, MA 01854 USA

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 24期

基金：

中国国家自然科学基金;

关键词：

PHASE; METAMATERIALS; REFLECTION; REFRACTION; INDEX; WAVES; IMAGE; CLOAK;

D O I：

10.1364/OE.473090

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Metasurfaces with complex-amplitude modulation are superior in power regulation and hologram imaging resolution compared with those with phase-only modulation. Nevertheless, a single-cell metasurface with multi-band independent phase and amplitude controls is still a great challenge for the circularly polarized incidences. In this work, we propose and design a single-substrate-layer single-cell metasurface with independent complex-amplitude modulations at two discrete frequencies. Based on this emerging technique, a bi-spectral meta-hologram is designed and verified by both full-wave simulations and experiments, which could reconstruct two Chinese characters at the imaging plane at two frequencies. The proposed method shows great potential in multifunctional meta-devices with enhanced performance. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：42850 / 42860

页数：11

共 41 条

[1] Space-variant Pancharatnam-Berry phase optical elements with computer-generated subwavelength gratings [J].