Optical metasurfaces, planar subwavelength nanoantenna arrays engineered for on-demand wavefront manipulation, have emerged rapidly as a powerful tool enabling compact flat optics with dramatically enhanced capabilities. When integrated with active elements, the pixelated, thin device architecture further facilitates dynamic tuning of local and global optical responses. In this talk, I will discuss opportunities and challenges of employing metasurfaces in a variety of optical systems that are traditionally bulky and complicated. Leveraging advanced materials, designs and architectures, I will further describe our efforts to develop ultra-compact all-dielectric metasurface optics with unprecedented performance, such as ultra-wide field-of-view metalenses, solid-state active meta-optics, new imaging and sensing architectures, etc. The recent progress shows that the judiciously engineered optical metasurfaces can significantly boost the performance, allow novel functionalities and effectively reduce the size, weight, power and cost (SWaP-C) of future optical systems.
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