[22p-A307-1~17] 6.6 Probe Microscopy

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)

[22p-A307-7] Development of optical excitation dynamics evaluation method by pump-probe AFM using delay time modulation

〇(M2)Rin Wakabayashi¹, Hiroyuki Mogi¹, Yusuke Arashida¹, Shoji Yoshida¹, Osamu Takeuchi¹, Hidemi Shigekawa¹ (1.Univ. of Tsukuba)

Keywords:

atomic force microscope,pump probe spectroscopy,dynamics

AFM can measure electrical, mechanical, and other properties on the nanoscale for conductive and nonconductive samples. On the other hand, the optical pump-probe method can measure ultrafast phenomena. We have combined these two methods and developed time resolved FMAFM using delay time modulation. Delay time modulation can minimize the effect of probe thermal expansion, which has been an issue in previous research. Using this method, we conducted time-resolved measurements on a GaAs(110) cleaved surface and succeeded in obtaining a lifetime of about 60 ns from exponential fitting.