Researchers at the National University of Singapore (NUS) and Nanyang Technological University (NTU) have employed a focused laser beam of spot size less than 1 µm to study the localized photoresponse of individual metal oxide nanowires. By comparing the photocurrent produced upon global and localized laser irradiation, the team gained a better understanding of the fundamental mechanism governing photocarrier generation and transport in individual nanowire photodetectors.

http://nanotechweb.org/cws/article/lab/45340