Joint Seminar By SKL, ECE Dept and SID - Generation and Modulation of High-Dissymmetry Circularly Polarized Luminescence
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Chiroptical nanomaterials with strong and switchable circularly polarized luminescence (CPL) have been intensively studied due to their potential applications in the realm of chiral photonics, display and imaging, information encryption and storage, asymmetric catalysis, and biosensing. In this talk, we demonstrate high-glum CPL from different integrated materials composites, including: 1) cholesteric liquid crystals (CLCs) integrated with a uniaxially aligned upconversion nanorod (UCNR) film；2) CLCs integrated with a uniform Au clusters (AuCs) film, 3) quantum emitters-coated on suspended chiral optical metasurfaces. More importantly, based on the intrinsic properties of CLCs, electrically tunable, thermally reversible and optically tunable CPL from the composites have been successfully demonstrated. Chirality-reversed CPL has also been achieved from quantum emitters-coated on suspended chiral optical metasurfaces.
Dr. Yanjun Liu is currently a professor with Department of Electrical and Electronic Engineering at Southern University of Science and Technology (SUSTech), China. He received his Ph.D. degree in photonics from Nanyang Technological University, Singapore, in 2007. Before joining SUSTech, he was a research scientist in A*STAR, Singapore (2010-2016), and postdoctoral scholar in Penn State University (2008-2010) and European Laboratory for Non-Linear Spectroscopy (LENS) (2007-2008). His research interests include liquid crystal photonics, active plasmonics and metamaterials, etc. He has authored/co-authored over 260 peer-reviewed journal publications and over 50 invited conference talks in his research fields. He has also received several awards/honors including Chinese Government Award for Outstanding Self-Financed Students Abroad, ICTP TRIL Programme Fellowship, Thousand Young Talents Plan, Guangdong Pearl River Talent Program—Top Young Talents, and Overseas High-Caliber Personnel (Level B) in Shenzhen. He is also the senior member of IEEE and OPTICA.