Research Focus Optoelectronic materials & devices, Semiconductor physics; Optical spectroscopy; Nano-materials & Technology, etc. Detailed Research Interests Our research theme exists at the interface between optical physics and material science, i.e. light-matter interaction. Besides the physical interest, potential application is always our strong driving force for the research. Current research activities will focus on but not limited to the following topics. Optical spectroscopic characterization Optical spectroscopy provides a powerful tool for understanding the physical properties of a wide range of condensed matters. The investigated materials cover from the traditional inorganic semiconductors (bulk, quantum dots, wires and wells), organic semiconductors to artificial materials (organic/inorganic hybrid structures and composites). We are interested in the investigation of electronic structures, various elemental excitations and their dynamic process in semiconductor structures; energy transfer; charge separation and transport in various organic blends and organic/inorganic composites. The clarification of the underlying physics is very important for both fundamental physics interest and development of optoelectronic devices.