公开(公告)号：US20210080411A1

公开(公告)日：2021-03-18

申请号：US16982428

申请日：2019-04-17

申请人： Okinawa Institute of Science and Technology School Corporation

发明人： Keshav Moreshwar Dani ,  Michael Ka Lun Man ,  E Laine Wong

IPC分类号： G01N23/227

摘要： A system and method for redistributing photoexcited electrons and generate local currents within an optical spot on ultrafast timescales achieving in high-speed, high-resolution control of opto-electronic phenomena is disclosed. Selectively addressing sub-populations of photoexcited electrons within the distribution is necessary. By exploiting the spatial intensity variations in an ultrafast light pulse, local surface fields are generated within the photoexcitation spot of a doped semiconductor, which pull apart the photoexcited electrons into two separate distributions. This redistribution process can be controlled via the spatial profile and intensity of the photoexciting pulse.