Spectroscopically forbidden infra-red emission in Au-vertical graphene hybrid nanostructures. (23rd October 2017)

• Record Type: Journal Article
• Authors: Sivadasan, A K; Parida, Santanu; Ghosh, Subrata; Pandian, Ramanathaswamy; Dhara, Sandip
• Is Part Of: Nanotechnology. Volume 28:Number 46(2017)
• Publication Date: 2017-10-23
• Subjects: plasmonics -- infra-red emission -- vertical graphene -- Au-vertical graphene hybrid nanostructures -- photonic confimenet; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aa8d90
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Implementation of Au nanoparticles (NPs) is a subject for frontier plasmonic research due to its fascinating optical properties. Herein, the present study deals with plasmonic assisted emission properties of Au NPs-vertical graphene (VG) hybrid nanostructures. The influence of effective polarizability of Au NPs on the surface enhanced Raman scattering and luminescence properties is investigated. In addition, a remarkable infra-red emission in the hybrid nanostructures is observed and interpreted on the basis of intra-band transitions in Au NPs. The flake-like nanoporous VG structure is invoked for the generation of additional confined photons to impart additional momentum and a gradient of confined excitation energy towards initiating the intra-band transitions of Au NPs. Integrating Au plasmonic materials in three-dimensional VG nanostructures enhances the light–matter interactions. The present study provides a new adaptable plasmonic assisted pathway for optoelectronic and sensing applications.