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Chin. Opt. Lett.
 Home  List of Issues    Issue 11 , Vol. 13 , 2015    10.3788/COL201513.111401


Highly sensitive and homogeneous SERS substrate fabricated by a femtosecond laser combined with dewetting
Xudong Tan, Lan Jiang, Jie Hu, Pengjun Liu, Andong Wang, and Yong Lu
Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, [Beijing Institute of Technology], Beijing 100081, China

Chin. Opt. Lett., 2015, 13(11): pp.111401

DOI:10.3788/COL201513.111401
Topic:Lasers and laser optics
Keywords(OCIS Code): 240.6695  140.7090  

Abstract
We report a simple, cost-effective and repeatable method for fabricating a large area and uniform substrate for surface-enhanced Raman scattering (SERS). The silicon, micromachined by a femtosecond laser, is coated with gold film and then treated through the dewetting process. The morphology shows a higher electric field enhancement due to light trapping. The enhancement factor of the SERS substrate is 9.2×107 with a 5 nm-thick film coated. Moreover, it also exhibits a uniform signal through Raman mapping and chemical stability with the greatest intensity deviation of 6% after a month. The proposed technique provides an opportunity to equip microchips with the SERS capabilities of high sensitivity, chemical stability, and homogeneous signals.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2015/6/16
Accepted:2015/9/10
Posted online:2015/10/5

Get Citation: Xudong Tan, Lan Jiang, Jie Hu, Pengjun Liu, Andong Wang, and Yong Lu, "Highly sensitive and homogeneous SERS substrate fabricated by a femtosecond laser combined with dewetting," Chin. Opt. Lett. 13(11), 111401(2015)

Note: This work was supported by the National 973 Program of China (No.?2011CB013000), the National Natural Science Foundation of China (Nos.?91323301 and 51322511), and the Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China (No.?708018).



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