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

Research output: Contribution to journalArticle


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

Colleges, School and Institutes

External organisations

  • Nanomaterials Characterization and Sensors Section, Surface and Nanoscience Division, Indira Gandhi Centre for Atomic Research, Homi Bhabha National Institute


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
Issue number46
Early online date19 Sep 2017
Publication statusPublished - 23 Oct 2017


  • Journal Article