Advances in Metasurfaces for Planar Optics and Devices

Dear Colleagues,

Motivated by the eagerness of planar photonic devices towards being thin, lightweight and flexible, research on metasurfaces has provided a general platform to implement advanced light integration with miniaturization, low-cost, multi-channel or even multifunctionality features. In the past ten years, we have witnessed a revolutionary step in planar optics driven by metasurfaces, which has enabled a new way to precisely manipulate optical properties, such as amplitude, phase, polarization states and frequency at a subwavelength scale. Metasurfaces have provided new opportunities for ultrathin planar elements and devices for advanced light integration, while their fabrication requires only single-step patterning. Therefore, metasurfaces can facilitate the deployment of planar devices and systems in various fields requiring high integration, including imaging, computing, storage, sensing, display, information encryption, optical communications, and fundamental physics. Benefiting from their ultrathin nature and unprecedented capability to control light propagation in free-space or on-chip, metasurfaces enable tasks that are not possible with classical optical techniques, thus creating promising advances in a variety of scientific fields that impact our daily life. Despite the great success of metasurfaces in planar optics and devices, we must face the fact that many long-existing problems still do not have successful solutions, including dynamic control, the trade-off between efficiency, bandwidth and functionality, chromatic control, integration with other platforms, large-scale fabrication cost, and so on. In this issue, we welcome contributions regarding recent advances in the planar metasurface-related fields, including (but not limited to):

• Metalens;
• Meta-holography;
• Meta-nanoprinting;
• Metasurfaces for optical computing;
• Tunable metasurfaces;
• Nonlinear metasurfaces;
• Multi-layer metasurfaces;
• Inverse design and artificial intelligence metasurfaces;
• New physics in metasurfaces;
• Planar metasurfaces for electromagnetic/light manipulation;
• Fabrication technology for metasurfaces;
• Applications of metasurfaces.

Prof. Dr. Guoxing Zheng
Prof. Dr. Jinhui Shi
Dr. Zile Li
Dr. Juan Deng
Guest Editors

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• planar optics
• metasurface
• metalens
• holography
• nanoprinting
• light manipulation