Speaker ：Ana Dangyuan Lei

Time       ：May 26 ,2015  14：00 

Location：Fourth meeting room of Research Building

Abstarct：In this talk, I will show our recent work on the use of SERS spectroscopy forprobing the spatial nonlocality effect – a quantum mechanical phenomenon, whichis recently believed to set an ultimate limit of plasmonic near-field enhancement in metallic nanostructures with critical dimensions on the order of a few nanometers or less . I will present our theoretical and experimental investigations on the effect of spatial nonlocality in metal films with controllable surface roughness .Our results reveal that the spatial nonlocality effect on the metal dielectric response has to be taken into account for more accurate prediction of the SERS enhancement at large surface roughnesses.