Fast Fabrication of a Ag Nanostructure Substrate Using the Femtosecond Laser for Broad-Band and Tunable Plasmonic Enhancement

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• 作者：Ming Lun Tseng ; Yao-Wei Huang ; Min-Kai Hsiao ; Hsin Wei Huang ; Hao Ming Chen ; Yu Lim Chen ; Cheng Hung Chu ; Nien-Nan Chu ; You Je He ; Chia Min Chang ; Wei Chih Lin ; Ding-Wei Huang ; Hai-Pang Chiang ; Ru-Shi Liu ; Greg Sun ; Din Ping Tsai
• 刊名：ACS Nano
• 出版年：2012
• 出版时间：June 26, 2012
• 年：2012
• 卷：6
• 期：6
• 页码：5190-5197
• 全文大小：503K
• 年卷期：v.6,no.6(June 26, 2012)
• ISSN：1936-086X

文摘

Using a femtosecond laser, we have transformed the laser-direct-writing technique into a highly efficient method that can process AgO_x thin films into Ag nanostructures at a fast scanning rate of 2000 渭m²/min. The processed AgO_x thin films exhibit broad-band enhancement of optical absorption and effectively function as active SERS substrates. Probing of the plasmonic hotspots with dyed polymer beads indicates that these hotspots are uniformly distributed over the treated area.

Keywords:

plasmonics; laser-direct-writing technique; hotspot; fluorescence enhancement; SERS