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Graphene-assisted multilayer structure employing hybrid surface plasmon and magnetic plasmon for surface-enhanced vibrational spectroscopy
Wei, Wei1; Chen, Na1,2; Nong, Jinpeng1,2; Lan, Guilian1; Wang, Wei3; Yi, Juemin4; Tang, Linlong2
2018
摘要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 107for SERS and 105for 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. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI10.1364/OE.26.016903
发表期刊Optics Express
ISSN1094-4087
卷号26期号:13页码:16903-16916
收录类别EI
语种英语
EISSN10944087