Abstract:
Computation methods including density-functional theory (DFT), tight-binding (TB) as well as effective bond-orbital model (EBOM), and k.p model for calculation of optical and transport properties of solids and nanostructures will be discussed. Transport properties of nanostructure junctions modeled by non-equilibrium Green function method will also be presented. Examples include optical excitations of solids and nanostructures including the electron-hole interaction obtained within symmetry-adapted basis, time-dependent DFT calculations of optical excitations of semiconductor alloys, and tunneling current spectra as well as thermoelectric characteristics of coupled-quantum dot junctions.
Brief Bio:
Yia-Chung Chang received his bachelor degree from National Cheng-Kung University, master degree and doctoral degree from California Institute of Technology. He joined the Physics Department, University of Illinois at Urbana-Champaign in 1980 as a visiting research assistant professor, and became an assistant professor in 1982, associate professor in 1986, and professor in 1991. In 2005, he joined Academia Sinica, Taiwan as a Distinguished Research Fellow and Director of the Research Center for Applied Sciences (RCAS). In 2012, he completed his two terms of directorship and remained as a Distinguished Research Fellow in RCAS. He is a fellow of American Physical Society and Academy of Nanoscience and Nanotechnology. He received the Distinguished Alumni Award of National Cheng-Kung University in 2009 and the Taiwan-France Science-technology Prize in 2015. He is a Thomson ISI highly cited scientist with nearly 10000 citations.
Dr. Chang’s main research interests are in condensed matter theory, semiconductor electronics, photonic materials, and optoelectronic devices. In the last three decades he has worked on a series of related topics including shallow impurities and excitons in semiconductor superlattices and quatum wells, electronic and optical properties of semiconductors, surfaces and interfaces, and nanostructures, phonons and electron-phonon couplings in semiconductors and nanostructures, non-linear optical properties, many-body effects, exciton condensation, magnetic multilayers and giant magentoresistance, photonic crystals, optical metrology, detectors, lasers, quantum transport properties of nanostructures, spintronics, and quantum computing.