About this Research Topic
Driven by device miniaturization and system integration, there is huge interest in developing ultrathin and lightweight planar optical devices with novel functionalities that cannot be obtained with conventional optical elements. Optical metasurfaces are planar nanostructured interfaces and have recently attracted tremendous interest due to their unprecedented capability in the manipulation of the amplitude, phase and polarization of light at subwavelength scale. Optical metasurfaces have provided new opportunities for ultrathin photonic devices and system integration, which can facilitate real-world deployment of optical devices and systems in various research fields, including imaging, sensing, displays, encryption, optical communications, and fundamental physics. Benefiting from their ultrathin nature and unprecedented capability to control light propagation in a desirable manner, metasurface technology can enable tasks that aren't possible with classical methods, promising advances in a variety of scientific fields impacting our everyday lives.
Metasurfaces have been used to realize various ultrathin and flat optical components, including metalenses, holograms, Spin Hall effects, structured beams and nonlinear optical devices. However, there are many existing problems such as efficiency, bandwidth, functionality, dynamic control, intuition-based design and its restriction, integration with other platforms, and fabrication cost. To deal with these problems, we are happy to see some recent advances in the metasurface field, including Huygens/gap-plasmon metasurfaces, multiplexing metasurfaces, dynamic metasurfaces, multi-functional metasurfaces, inverse design, artificial intelligence metasurfaces, metasurface on fibre, and large-scale metasurface fabrication. This research topic offers a perspective on the recent efforts toward the development of metasurfaces for photonic devices.
We invite the submission of Original Research, Review, Mini Review, Perspective articles on themes including, but not limited to:
• Highly efficient metasurfaces
• Metalenses and imaging
• Holographic devices and displays
• Multifunctional devices
• Multichannel devices
• Polarization detection and polarimetric imaging
• Tunable metadevices
• Metadevices with novel functionalities
• Generation and manipulation of structured beams
• Nonlinear metasurfaces
• Spin Hall effect
• Orbital angular momentum
• System integration with metasurfaces
• Metasurfaces for encryption
Keywords: metasurfaces, metalenses, Holograhpic devices, Structured light beams, Polarization detection and manipulation, Nonlinear metasurfaces, Tunable metasurfaces
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