[9p-S5-1~12] 3.5 Ultrashort-pulse and high-intensity lasers

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9p-S5-12] Cross-correlation measurements of optical-vortex-induced localized superconducting regions using optical vortex pulse pairs

〇Koshi Nagata¹, Taisei Shimizu¹, Tohru Kurosawa¹, Keisaku Yamane¹, Ryuji Morita¹, Yasunori Toda¹ (1.Hokkaido Univ)

Keywords:

cuprate high-temperature superconductor,photoinduced phase transition,optical vortex

Cross-correlation measurements using a pair of optical vortex pulses were realized by utilizing a localized superconducting region formed through optical vortex pulse irradiation. The cross-correlation between the localized superconducting region and the optical-vortex-excited region was measured using three-pulse pump–probe spectroscopy with an optical vortex pump pulse. As a result, a characteristic double-peaked response reflecting the spatial intensity distribution of the optical vortex was observed. Furthermore, the observed response profile evolved with the temporal change in the size of the localized superconducting region, enabling the spatiotemporal dynamics of the localized superconducting region to be probed.