Bilayer‐Metasurface Design, Fabrication, and Functionalization for Full‐Space Light Manipulation. Issue 7 (11th February 2022)

• Record Type: Journal Article
• Authors: Deng, Liangui; Li, Zile; Zhou, Zhou; He, Zhixue; Zeng, Yongquan; Zheng, Guoxing; Yu, Shaohua
• Is Part Of: Advanced optical materials. Volume 10:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-11
• Subjects: bilayer metasurfaces -- full space -- light manipulation -- meta‐holograms -- Pancharatnam–Berry phase; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202102179
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: Light manipulation with metasurfaces is usually implemented in either transmission or reflection space. Since the other half‐space is abandoned, it may hinder the improvement of information capacity and functionality of metasurfaces. Previously reported works have showcased some attempts to modulate trans‐reflective phase for full‐space light manipulation. However, they either fail to realize complete decoupling or introduce unwanted amplitude variation, which leads to the performance deterioration of meta‐devices. Herein, a general platform is proposed to independently manipulate the trans‐reflective light, benefitting from the significantly increased degrees of freedom gifted by bilayer metasurfaces. As examples, two different meta‐devices, i.e., a full‐space meta‐hologram and a trans‐reflective vortex beam generator both with pixel‐resolution up to 340 nm are fabricated and characterized. Owing to their completely decoupled trans‐reflective phase, full‐space light manipulation with total independence, low crosstalk, and high information capacity are well presented. This research can empower advanced research on optical storage, fiber communication, optical sensing, and lightening. Abstract : Enabled by bilayer metasurfaces, a general platform is proposed for completely decoupling optical phase in the reflection and transmission spaces. As a paradigm, two types of full‐space meta‐devices implementing full‐space holography and trans‐reflective vortex beam generating are demonstrated, respectively, both functions have shown their pixel‐resolution up to 340 nm and high‐performance characteristics in the visible range.