Séminaire ESYCOM - High Spatial/Energy Resolution Cathodoluminescence Spectroscopy

Date : Friday, July 3 at 13:30

"High Spatial/Energy Resolution Cathodoluminescence Spectroscopy: Powerful tool for precise characterization of Nanostructures" 

Prof. Dr. YU Dapeng, Peking University

Abstract

Nanowires have been a top-five focused research topics in physics, and stimulated intensive interests world-wide. This talk composes of two major parts. In the first part, I will give a brief summary of our contributions to the world-wide nanowire research. In the main second part, I will extend to show the advantage of both high spatial and energy resolution cathodoluminescence (CL) in characterization of the fine structures of the nanomaterials. In particularly, I will demonstrate that the high special resolution of the CL at ~ 5.5 K enable us to address the significant strain modulation of the optical emission and electronic structures of semiconductor nano/micro-wires[1-5]. In contrast, the high energy resolution of the CL makes it possible to “see” directly the resonant SPP modes that are confined to the metal nanocavity.

Biography

D.P. Yu was promoted to full professor in 1999 in Peking University.  He was then supported by the Outstanding Young Scientists Funding by NSFC in 2000.  He was further sponsored by the Chang Kung Professorship in 2002 by Ministry of Education, China.  Prof D.P. Yu is among the world leaders in developing method to synthesize and characterize 1-dimensional semiconductor (silicon and metal oxide) nanowires from the bottom, and made important contributions to the investigations of nanowire materials.

His group has published more than 400 peer-reviewed papers in nanowire materials and physics in important journal such as Physical Review B/Letters, Nature Communications, Advanced Materials, Nano Letters and Applied Physics Letters/JAP. His work has been cited for over 18000 times by colleagues word-wide, and he has an H-index of 68 (from Google Scholar). His work has been also recognized by important awards such as the awards from the Ministry of Education for “1-D Nanostructured Materials and Physics”; 1st class, 2004, P. R. China, and the “National Natural Science Award” “1-D Nanostructured Materials and Physics”, 2nd class, P. R. China, 2007. Prof. Dapeng Yu has mentored more than 60 graduates.