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北大分子医学所学术报告(Cheng-Wei Qiu)

Institute of Molecular Medicine Center

 for Life Sciences Research Seminar

Title:Synthetic interfacial optics with metasurfaces and 2D monolayers

Speaker:Cheng-Wei Qiu, Ph.D.
                Dean's chair professor
                Department of Electrical & Computer Engineering,
                National University of Singapore, Singapore

Time:2019年11月8日(星期五)下午4:00-5:00

Place:北京大学英杰交流中心306会议室

Host:北京大学分子医学研究所   陈良怡 (Tel. 6276-4959)
           北京大学分子医学研究所   程和平 (Tel. 6276-5957)  

Abstract: Metasurfaces and 2D materials have been developing as two important candidates in the interfacial engineering, providing a plethora of new possibilities in novel optoelectronic functions and applications. The synergies between those two domains hold great promises in manipulating light-matter interaction. In this tutorial talk, I will review and report some of the most recent developments in this field of interfacial engineering, via the artificially constructed hybridized structures of ultrathin thickness compared to the wavelength. In particular, the low-dimension and high-frequency scaling may promise a lot more applications. The atomic thickness of 2D monolayers provides many interesting physical properties, but limits the sufficient interaction with the light. Hence, nano-patterned metasurfaces are deployed with 2D monolayers to modulate and structure novel light behavior. The following advanced functional optical devices, developed by our group, will be discussed: 3D meta-hologram, high-pixelated nanoprinting, dynamic OAM generation, and more interestingly, the 2D-material meta-lens of<1nm thickness, significantly enhanced SHG, PL, and tunable structural colors, by the coordinated hybridization between those two parties. Our work paves a roadmap to design sophisticated and advanced optical devices, with low dimension, miniaturization, randomness, and scaled-up capability.