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

A. K. Sivadasan, Santanu Parida, Subrata Ghosh, Ramanathaswamy Pandian, Sandip Dhara

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

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.

Original languageEnglish
Article number465703
JournalNanotechnology
Volume28
Issue number46
Early online date19 Sep 2017
DOIs
Publication statusPublished - 23 Oct 2017

Keywords

  • Journal Article

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