Chi-Tsu Yuan is a distinguish professor in the Department of Physics at Chung Yuan Christian University. He obtained his Ph.D. in the Department of Electrophysics, National Chiao Tung University in 2008, where he mostly studied on the photophysical properties of single photon nanomaterials. He then embarked on a post-doctoral fellowship in the Research Center for Applied Science in Academica Sinica from 2008 to 2012, before becoming a faculty member in the department of physics in Chung Yuan Christian University as an assistant professor. Throughout the years, his research and expertise were mainly discussing the synthesis, photopysical properties of quantum dots and nanomaterials, optical spectroscopic and microscopy technique, optoelectronic applications of quantum dots (luminescent solar concentrators), and defects in wide bandgap semiconductor materials. He had published his research in Nanoscale Advances, ACS Applied Material and Interface, ACS Nano, Solar RRL, Nanoscale, and more. Furthermore, he also serves as the reviewer in Advanced Functional Materials, Nano Letters, ACS Applied Materials and Interfaces.

Nanophotonics laboratory, led by Professor Chi-Tsu Yuan at Chung Yuan Christian University, is a research hub dedicated in understanding and optimizing the optical behavior of advanced functional materials. This laboratory employs photoluminescence spectroscopy and spatially resolved micro- and confocal photoluminescence to investigate quantum dots, two-dimensional materials, wide-bandgap semiconductors (GaN and SiC), and polymer waveguide systems within a unified characterization framework. In quantum dots and 2D materials, photoluminescence is used to probe quantum confinement, excitonic transitions, the influence of surface states and layer thickness on emission efficiency. For GaN and SiC, spatial luminescence mapping enables identification of defect-related recombination pathways and assessment of material nonuniformity associated with extended defects and impurities that critically impact device performance. In polymer waveguides, confocal microscopy technique is used to determine the surface roughness (top, side wall, and edge) of the fabricated waveguides towards AI application. Collectively, this laboratory aims to establish clear correlations between optical signatures and material structure, dimensionality, and defect landscapes, demonstrating the versatility of photoluminescence techniques as essential diagnostic tools in modern materials physics and optoelectronic research.

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