Electron Energy Loss Spectroscopy of a Chiral Plasmonic Structure

Electron Microscopy and Analysis Group Conference 2015

Paterson, G.W.^1 ; Karimullah, A.^2 ; Williamson, S.D.R.^1 ; Kadodwala, M.^2 ; MacLaren, D.A.^1

SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow

G12 8QQ, United Kingdom^1

School of Chemistry, University of Glasgow, Glasgow

G12 8QQ, United Kingdom^2

关键词: Analysis and simulation;    Fabrication imperfections;    Localised;    Nanometrics;    Non-negative matrix factorisation;    Scanning transmission electron microscopy;    Surface plasmonic resonances;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012005/pdf
DOI  :  10.1088/1742-6596/644/1/012005

来源: IOP

【 摘 要 】

A detailed analysis of the plasmonic excitations within a nanopatterned gold chiral biosensor element, measured by scanning transmission electron microscopy electron energy loss spectroscopy, is presented. We discuss aspects of data acquisition, processing, analysis and simulation. The localised surface plasmonic resonance modes in the structure are extracted using non-negative matrix factorisation and we use simulations to correlate notable deviations from the idealised spectrum to nanometric fabrication imperfections. The methodology presented has wide applicability to a variety of metamaterials.