Core Viewpoint - The article discusses the development of a new type of laser called "metalaser," which enhances the understanding and performance of lasers in various optical and photonic applications [2][5]. Group 1: Introduction to Metalasers - The research team from Harbin Institute of Technology (Shenzhen) has proposed and realized the metalaser, utilizing the interaction between local and non-local responses of dielectric resonant metasurfaces [3][4]. - Traditional lasers require additional optical components to modify laser characteristics, leading to larger systems and limitations due to speckle noise [2]. Group 2: Features and Advantages of Metalasers - The non-local interactions between meta-atoms in planar structures limit laser modes, while local variations in dipole moments precisely shape the beam wavefront [4]. - Metalasers can emit with any desired profile, including focal points, focal lines, vector beams, vortex beams, and even holograms [4]. - The scattering waves from metalasers do not experience resonant amplification like traditional laser modes, resulting in significantly weaker intensity, which minimizes speckle noise issues found in conventional laser holography [4].