Department of Applied Physics, Osaka City University, Japan

Biography: Professor O. Kojima received Ph.D in Department of Applied Physics from Osaka City University, Japan, in 2005. He is now associate professor in Graduate School of Engineering, Kobe University. He mainly focuses on research for exciton dynamics in nanostructured semiconductors using ultrafast spectroscopy.

Speech Title: Emission of continuous terahertz wave using exciton interference
Abstract: As continuous wave terahertz (THz) sources, the differential-frequency-mixing has an advantage for the frequency tenability by changing the energy separation of the two lasers. Considering the inhomogeneous width of the quantum confinement systems, use of the excitons enables wide frequency tuning. The THz sources with the narrow bandwidth and wide frequency tunability will be applied to the high resolution THz spectroscopy. In this work, we show the continuous THz wave generation under the exciton excitation conditions.