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Microstructured polymer-based substrates with broadband absorption for surface-enhanced Raman scattering

Authors

  • Ming Yang,

    1. The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin, China
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  • Qiang Wu,

    Corresponding author
    1. The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin, China
    • Correspondence to: Qiang Wu, The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin 300457, China.

      E-mail: wuqiang@nankai.edu.cn

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  • Jiwei Qi,

    1. The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin, China
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  • Irena Drevensek-Olenik,

    1. Faculty of Mathematics and Physics, University of Ljubljana and J. Stefan Institute, Slovenia
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  • Zhandong Chen,

    1. The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin, China
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  • Yusong Pan,

    1. The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin, China
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  • Jingjun Xu

    1. The MOE Key Laboratory of Weak Light Nonlinear Photonics, TEDA Applied Physics School and School of Physics, Nankai University, Tianjin, China
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Abstract

Large area (3 × 3 cm2) substrates for surface-enhanced Raman scattering were fabricated by combining femtosecond laser microstructuring and soft lithography techniques. The fabrication procedure is as follows: (i) femtosecond laser machining is used to create a silicon master copy, (ii) replicates from polydimethylsiloxane are made, and (iii) a 50-nm-thick gold film is deposited on the surface of the replicates. The resulting substrates exhibit strongly enhanced absorption in the spectral region of 350 ∼ 1000 nm and generate enhanced Raman signal with enhancement factor of the order of 107 for 10- 6 M rhodamine 6G. The main advantages of our substrates are low cost, large active area, and possibility for mass replication. Copyright © 2013 John Wiley & Sons, Ltd.

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