Journal
OPTICS EXPRESS
Volume 26, Issue 13, Pages 16903-16916Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.016903
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Funding
- National Natural Science Foundation of China [61675037, 61405021, 61675139]
- Chongqing Research Program of Basic Research and Frontier Technology [cstc2017jcyjBX0048, cstc2017jcyjAX0038]
- Fundamental Research Funds for the Central Universities [2018CDQYGD0022]
- graduate research and innovation foundation of Chongqing, China [CYB17018]
- National High Technology Research and Development Program of China [2015AA034801]
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A graphene-assisted vertical multilayer structure is proposed for high performance surface-enhanced Raman scattering (SERS) and surface-enhanced infrared absorption (SEIRA) spectroscopies on a single substrate, employing simultaneous localized surface plasmon in the visible region and magnetic plasmon resonance in the mid-infrared region. Such multilayer structure consists of a monolayer graphene sandwiched between Ag nanoparticles (NPs) and a metal-insulator-metal (MIM) microstructure, which can be easily fabricated by a standard surface micromachining process. Benefiting from the large near field enhancement by the hybrid plasmons in both visible and mid-infrared regions, a high enhancement factor of up to 10(7) for SERS and 10(5) for SEIRA can be achieved. Additionally, the strong magnetic resonance of the MIM microstructure can be tuned in broadband to selectively enhance the desired vibration modes of molecules. The strong SERS and SEIRA enhancement together with easy fabrication provides new opportunities for developing integrated plasmonic devices for multispectral detection of molecules on the same substrate. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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