Spectroscopic and Kinetic Studies of Luminescent Crystals and Halomethanes

We have applied spectroscopy techniques for studying the spectroscopy and kinetics in crystal materials as well as in atmospheric molecules during the past years. This proposed study will focus on the energy transfer processes in molecules containing trivalent rare earth elements including mechanisms, rates, and efficiency. Accurate kinetics models were developed and fit experimental data perfectly. We will elucidate the details of these energy processes and the results will pave the foundation for developing related technology such as display, biosensor, and solar cell. With respect to the atmospheric species, we are currently studying the formation mechanisms of highly excited halogens in the photolysis of halomethanes at ultraviolet wavelengths. We are also interested in studying the spectroscopy of related triatomic free radicals such as CBr2 and CI2. In collaboration with several research groups, we have been investigating the non-linear optical properties such as second-harmonic generation (SHG) in inorganic and organic materials. Excellent results were obtained and a patent application is pending approval. With the financial support from MOST, fruitful accomplishments could be expected in near future.