Multifunctional metasurface flat optics for imaging and sensing

Optical metasurfaces consist of planar subwavelength nanoantenna arrays that offer singular ability to sculpt wavefront in almost arbitrary manners. They are thereby poised to become a powerful tool enabling compact and high-performance optics. Multifunctional metasurfaces, whose optical responses vary according to the operation conditions, further allow a plurality of new functionalities unattainable with traditional optical systems. In this talk, we discuss the development of multifunctional meta-optics and demonstrations in imaging and sensing applications.