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arXiv · 1806.03064

Spectroscopically forbidden infra-red emission in Au-vertical graphene hybrid nanostructures

A. K. Sivadasan·Santanu Parida·Subrata Ghosh·Ramanathaswamy Pandian·Sandip Dhara
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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 (IR) 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.

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A. K. Sivadasan, Santanu Parida, Subrata Ghosh, Ramanathaswamy Pandian, Sandip Dhara. 2018-06-08. Spectroscopically forbidden infra-red emission in Au-vertical graphene hybrid nanostructures. https://doi.org/10.1088/1361-6528%2Faa8d90

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