Ultrafast spin spectroscopy by impulsive terahertz pulse excitations

  • Makoto Nakajima Institute of Laser Engineering, Osaka University

Abstract

Terahertz pulses with the magnetic field components can excite directly and control the magnetization and spin precessions in magnetic materials. Macroscopic magnetization control is successfully demonstrated by using terahertz pulse excitations around the spin reorientation phase transition. The ultrafast response of the magnetizations for nano-magnet epsilon type ferrite shows ultrafast build up and decay of sub-picoseconds which corresponds to time duration of the terahertz excitation pulses.

About the Speaker

Makoto Nakajima is an Associate Professor at Osaka University, Institute of Laser Engineering (ILE). He earned his Bachelor's, Master's, and Ph.D. degrees from Osaka University. After his Ph.D. graduation, he became an Assistant Professor at the University of Tokyo, Institute for Solid State Physics. Before returning to ILE in 2014, he also was an Associate Professor of Chiba University. He now works on ultrafast spectroscopy, terahertz wave engineering and spintronics, and metamaterials research by investigating ultrafast phenomena in magnetic materials, semiconductor materials, and metallic microstructures using femtosecond lasers pulses.

Published
2019-05-22
How to Cite
[1]
M. Nakajima. Ultrafast spin spectroscopy by impulsive terahertz pulse excitations, Proceedings of the Samahang Pisika ng Pilipinas 37, SPP-2019-INV-1B-01 (2019). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2019-INV-1B-01.