Mid-infrared sensing of molecular vibrational modes with tunable graphene plasmons

• Main Authors: Wu, Tingting, Luo, Yu, Wei, Lei
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2017
• Subjects: Surface plasmons; Photonic integrated circuits
• Online Access: https://hdl.handle.net/10356/84042; http://hdl.handle.net/10220/42946
• Institution: Nanyang Technological University

We study the tunable plasmons based on a graphene integrated gold grating structure to sense the vibrational modes of nanometric molecules. The greatly enhanced light-matter interaction and the broadband tunability of the localized graphene plasmonic resonance enable accurate label-free identification of the molecular vibrational modes at subwavelength scale. Our results may accelerate the further development of novel cost-effective biosensors with superior molecular chemical fingerprint sensitivity in an active graphene plasmonic device.