Since the invention and further development of lasers in the 1960s, photonics has grown
into a field that permeates virtually every aspect of modern life. As photonics deals with the …

Metasurfaces, a two-dimensional (2D) form of metamaterials constituted by planar meta-
atoms, exhibit exotic abilities to tailor electromagnetic (EM) waves freely. Over the past …

Nonlinear optics is a well-established field of research that traditionally relies on the
interaction of light with macroscopic nonlinear media over distances significantly greater …

Integrated nonlinear photonics, combined nonlinear optics with state‐of‐the‐art photonic
integration, play a crucial role in chip‐integrated technologies including optical frequency …

Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

With advantages of small size, light weight, flexible design, and easy mass production, micro-
optical components of hard materials have a wide range of potential applications in artificial …

Structured lights, including beams carrying spin and orbital angular momenta, radially and
azimuthally polarized vector beams, as well as spatiotemporal optical vortices, have …

The rapid development of optical technologies, such as optical manipulation, data
processing, sensing, microscopy, and communications, necessitates new degrees of …

Metasurfaces, composed of artificial meta-atoms of subwavelength size, can support strong
light–matter interaction based on multipolar resonances and plasmonics, hence offering the …

High-quality photonic materials are critical for promoting integrated photonic devices with
broad bandwidths, high efficiencies, and flexibilities for high-volume chip-scale fabrication …