Final PhD Seminar

Advanced Wavefront Control Based with Linear and Nonlinear Metasurfaces

Mr Lei Wang
Friday 23 February 2018 11am–12pm

Recent development of holographic metasurfaces shows great potential for practical applications. Researchers utilize all-dielectric metasurfaces to create compact optical devices function as flat lenses, polarization multiplexers, holographic displays and so on. The high index all-dielectric metasurfaces provide high efficiency and full capability for wavefront control.

Nonlinear metasurface also has an important role in modern nano-photonics. The multipole resonances of the meta-atoms can be tuned for both efficient frequency conversions and wavefront engineering, making them promising candidates for all-optical signal processing, ultrafast switching, optical telecommunication and quantum optic applications.

In my PhD studies, I developed phase control methods based on generalized Huygens’ principle with linear metasurface. The demonstrated holographic metasurfaces shows broadband grayscale image display with good fidelity and high performance. In the next step, the various nanoantennas were studied to explore the multipole resonance in the nonlinear process. Furthermore, the combined knowledge leads to the successful creation of nonlinear holographic devices base on silicon all-dielectric metasurfaces, which are capable of efficient nonlinear generation and complex wavefront control.


Mr Lei Wang

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