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【凝聚态物理-北京大学论坛 2024年第6期(总588期)】Metaphotonics for future optical components and devices: Design, materials and manufacturing
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主讲人: Prof. Junsuk Rho(Pohang University of Science and Technology (POSTECH), Korea)
地点: 物理大楼西563会议室
时间: 2023年3月28日(星期四) 下午3:00-4:30
主持 联系人: 马仁敏 [email protected]
主讲人简介: Prof. Rho is a Mu-Eun-Jae (无垠斋) Endowed Chair Professor and Young Distinguished Professor at Pohang University of Science and Technology (POSTECH), Korea, with a joint appointment in the Department of Chemical Engineering, Mechanical Engineering, and Electrical Engineering. He received his Ph.D. at the University of California, Berkeley (2013), M.S. at the University of Illinois, Urbana-Champaign (2008) and B.S. at Seoul National University, Korea (2007) all in Mechanical Engineering. Prior joining POSTECH, he conducted postdoctoral research in Materials Sciences Division & Molecular Foundry at Lawrence Berkeley National Laboratory, and also worked as a principal investigator (Ugo Fano Fellow) in Nanoscience and Technology Division & the Center for Nanoscale Materials at Argonne National Laboratory. Prof. Rho has authored and co-authored more than 300 high-impact journal papers including Science and Nature. He is also the recipients of several notable honors and awards such as US Department of Energy Argonne Named fellowship (2014), Korean Presidential Early Career Award for Scientists and Engineers (2019), Springer-Nature MINE Young Scientist Award (2020), Elsevier MEE/MNE Young Investigator Award and Lectureship (2020), Member of the Young Korean Academy of Science and Technology (Y-KAST) (2020), Associate Member of the National Academy of Engineering of Korea (NAEK) (2022), NAEK Young Engineers Award (2022), Hong Jin-Ki Creator Award (2022), Fulbright Visiting Scholar Fellowship (2022), Northwestern Simpson Fellowship (2022), Northwestern Eshbach Fellowship (2023), Clarivate Highly Cited Researcher (2023). He serves 14 editorial positions including Light: Science and Applications (Springer-Nature), Microsystems and Nanoengineering (Springer-Nature), npj Nanophotonics (Springe-Nature) and Nanophotonics (De Gruyter).

In this talk, I will show the recent unique demonstration of metasurfaces for successful miniaturization and performance acceleration of optical components and devices such as metalens-integrated camera/endoscope, full space dynamic structured light imaging, smart labelling and more. Then, I will discuss the recent approach for effective and efficient design of metasurfaces, and three low-cost manufacturing methods: 1) nanoimprinting with high-refractive-index dielectric particle embedding resin (PER), 2) bandgap engineering of hydrogenated amorphous silicon (a-Si:H), and 3) atomic-layer coating on imprinted resin. a-Si, TiO2, and ZrO2 PERs are used for metasurfaces at infrared (940 nm), visible (532 nm), and ultraviolet (325 and 248 nm), respectively; measured efficiencies reach 47% (940 nm), 91% (532 nm), 72% (325 nm), and 49% (248 nm). PER metasurfaces with an inverse design provide 3D, full-color holography at visible. The bandgap of a-Si:H is engineered to suppress optical losses, realizing metasurface efficiencies of 42% (450 nm), 65% (532 nm), and 75% (635 nm). We deposit an atomic layer on resin for 12-inch metasurfaces, achieving measured efficiencies of 61% (450 nm), 78% (532 nm), and 65% (635 nm). Finally, the recent development of mass production and manufacturing of metausrfaces and nanophotonic structures, and future direction with a bigger vision will be discussed.