Abstract:
Metasurfaces, artificially designed nano-scatterers, have attracted immense attention because of their remarkable ability to control the optical properties and wavefront at a subwavelength scale. Thus, they hold promise for various flat optical applications such as compact spectrometers and low-profile spatial light modulators. In this talk, I will first discuss the intriguing characteristics of optical metasurfaces for phase modulation, amplitude control, and dispersion engineering, which enable feasible applications of focusing metalens and achromatic metasurface devices. Subsequently, the presentation will shift to several approaches, such as automatic inverse design, toroidal resonance modes, and plasmonic Huygens source utilized to accomplish high-performance metasurfaces. Lastly, a metasurface-integrated microlaser that modulates the light properties at the source will be discussed.