Chinese Optics Letters, 2019, 17 (6): 062402, Published Online: Jun. 5, 2019
Control amplitude and phase of light by plasmonic meta-hologram with T-shaped nano-cavity Download: 769次
Abstract
Controlling both amplitude and phase of light in the subwavelength scale is a challenge for traditional optical devices. Here, we propose and numerically investigate a novel plasmonic meta-hologram, demonstrating broadband manipulation of both phase and amplitude in the subwavelength scale. In the meta-hologram, phase modulation is achieved by the detour phase distribution of unit cells, and amplitude is continuously modulated by a T-shaped nano-cavity with tunable plasmonic resonance. Compared to phase-only holograms, such a meta-hologram could reconstruct three-dimensional (3D) images with higher signal-to-noise ratio and better image quality, thus offering great potential in applications such as 3D displays, optical communications, and beam shaping.
Wei Song, Shanguang Zheng, Yanan Fu, Changjun Min, Yuquan Zhang, Zhenwei Xie, Xiaocong Yuan. Control amplitude and phase of light by plasmonic meta-hologram with T-shaped nano-cavity[J]. Chinese Optics Letters, 2019, 17(6): 062402.