Authors
Peter R. Wiecha, Marie-Maxime Mennemanteuil, Dmitry Khlopin, Jérôme Martin, Arnaud Arbouet, Davy Gérard, Alexandre Bouhelier, Jérôme Plain, and Aurélien Cuche,
Title
Local field enhancement and thermoplasmonics in multimodal aluminum structures
In
Physical Review B
Volume
Accepted
Publisher
American Physical Society
Year
2017
Publisher's URL
https://journals.aps.org/prb/accepted/5a077O24O861d42859124014e8c8cd4fb1c89d918
Indexed by
Abstract
Aluminum nanostructures have recently been at the focus of numerous studies due to their properties including oxidation stability and surface plasmon resonances covering the ultraviolet and visible spectral windows. In this article, we reveal a new facet of this metal relevant for both plasmonics purpose and photo-thermal conversion. The field distribution of high order plasmonic resonances existing in two-dimensional Al structures is studied by nonlinear photoluminescence (nPL) microscopy in a spectral region where electronic interband transitions occur. The polarization sensitivity of the field intensity maps shows that the electric field concentration can be addressed and controlled on-demand. We use a numerical tool based on the Green dyadic method to analyze our results and to simulate the absorbed energy that is locally converted into heat. The polarization-dependent temperature increase of the Al structures is experimentally quantitatively measured, and is in an excellent agreement with theoretical predictions. Our work highlights Al as a promising candidate for designing thermal nanosources integrated in coplanar geometries for thermally assisted nanomanipulation or biophysical applications.
Affiliations
Offprint