Miniaturized optical systems with planar form factors and low power consumption have many applications in wearable and mobile electronics, health monitoring devices, and as integral parts of medical and industrial equipment. Flat optical devices based on dielectric metasurfaces introduce a new approach for realization of such systems at low cost using conventional nanofabrication techniques. In this talk, I will present our work on dielectric metasurfaces that enable precise control of both polarization and phase with large transmission and high spatial resolution. Optical metasurface components such as MEMs tunable lenses, efficient wave plates, and components with novel functionalities will be discussed. I will also introduce a vertical on-chip integration platform enabled by cascading multiple metasurfaces and active optoelectronic components, and present optical systems such as cameras and spectrometers that have been implemented using this platform. This vertical integration scheme introduces a new architecture for the on-chip integration of conventional optical systems, and enables the unprecedented realization of massively parallel optical systems for computation, data storage, and biomedical sensing applications.
Amir Arbabi is an Assistant Professor in the ECE department at UMASS Amherst. Before joining UMass, he was a senior research scientist at Caltech. He received the B.Sc. degree from the University of Tehran, the M.Sc. degree from the University of Waterloo, and the Ph.D. degree from the University of Illinois at Urbana-Champaign, all in electrical engineering. He has conducted research on the development of novel semiconductor lasers and photonic integrated circuits, photonic and THz sensors, optical microscopy techniques, and dielectric metasurfaces. His current research interests include photonic integrated circuits and on-chip integration of free space optical elements and systems.