Research History

In 1989, he attended to the development of magneto-optical disks at Tosoh Corporation. In 1990, he studied fabrication and characterization of magnetic multilayer (Co/Ru, Co/Pt, Co/Pd, Co/Au multilayer) at Tosoh Corporation. In 1991-1993, he studied magnetic properties and structure of magnetic multilayer (Fe/Pt, Fe/Ag, Fe/Rh, Co/Au/Cu/Au, Co/Pd/Au/Pd, Fe/Co/Fe/Pd multilayer) and thin Co layer as a visiting researcher of Shinjo's laboratory at Kyoto university. In 1993-1995, he attended to the development of phase change disks (DVD) at Tosoh Corporation. From 1995, he has studied nanoscale fabrication and characterization using a scanning tunneling microscope (STM).

Nanoscale fabrication and characterization using STM

He studied the mechanism of single atom manipulation on Si(001)-(2x1)-H surfaces. He observed STM-induced light emission from a Si dangling bond. He found that optical selection rules held in the light creation in the tunneling gap. He showed that orbital symmetry can be observed in an energy-resolved manner with the spatial resolution of the STM. He developed new spin detection method based on STM-induced light emission.

Nanoelectronics

Oxide and semiconductor nanowires are promising tools in future opto- and spin-electronics. We fabricate unique nanowires and nanostructures and arrange individual nanostructure into desired arrangements to achieve novel functionality. We develop the scanning probe microscope (SPM)-based technique to measure local electrical, optical, and magnetic properties of individual nanostructures. Based on the understanding of their local properties, we design nanoscale arrangement and study mutual linkage of individual nanostructure.