Media type: Electronic Conference Proceeding Title: Negative group velocity of surface plasmons on thin metallic films Contributor: Liu, Yongmin; Pile, David F. P.; Liu, Zhaowei; Wu, Dongmin; Sun, Cheng; Zhang, Xiang Published: SPIE, 2006 Published in: SPIE Proceedings (2006) Extent: Language: Not determined DOI: 10.1117/12.681492 ISSN: 0277-786X Origination: Footnote: