High resolution characterization of plasmon resonances in silver nanostructures

Edson P. Bellido; David Rossouw; Gianluigi A. Botton

doi:10.1117/12.2061888

10 September 2014 High resolution characterization of plasmon resonances in silver nanostructures

Edson P. Bellido, David Rossouw, Gianluigi A. Botton

Proceedings Volume 9163, Plasmonics: Metallic Nanostructures and Their Optical Properties XII; 91632Z (2014) https://doi.org/10.1117/12.2061888
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

In this work, we use the iterative Richardson-Lucy (RL) deconvolution to further increase the energy resolution of electron energy loss spectra of surface plasmon resonances (SPR) in silver nanostructures. We obtain a record e_ective energy resolution of 10 meV after 500 iterations for spectral features below 1 eV. We extract energy- _ltered maps of SPR of a nanorod at energies down to 0.25 eV, corresponding to the mid-infrared region on the electromagnetic spectrum. And we are able to identify hydrid-SPR peaks separated by only 70 meV from two nano-squares with a gap of 100 nm between them, demonstrating that the RL deconvolution applied to spectra acquired with a monochromator is a useful tool to characterize plasmonic structures at low energies with high energy resolution.

Citation Download Citation

Edson P. Bellido, David Rossouw, and Gianluigi A. Botton "High resolution characterization of plasmon resonances in silver nanostructures", Proc. SPIE 9163, Plasmonics: Metallic Nanostructures and Their Optical Properties XII, 91632Z (10 September 2014); https://doi.org/10.1117/12.2061888

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