Effect of roughness on surface plasmons propagation along deep and shallow metallic diffraction gratings.

Hugo Bruhier,Stéphanie Reynaud,Yves Jourlin,Olivier Parriaux,Christelle Varenne,Amadou Ndiaye,Colette Veillas,Jérôme Brunet,Isabelle Verrier,Thiaka Gueye

doi:10.1364/ol.443659

Hugo Bruhier, Stéphanie Reynaud + Show 8 more

Open Access

https://doi.org/10.1364/ol.443659

Copy DOI

Abstract

The roughness of shallow or deep metallic diffraction gratings modifies the propagation of surface plasmon mode along the metallic-air interface. The scattering losses lead to a spectral or angular broadening of the surface plasmon resonance (SPR) and to a shift of the resonance wavelength and coupling angle. This mechanism is deeply analyzed both experimentally and theoretically to overcome these effects when such structures, in particular deep ones, are used as SPR-based sensors.

Highlights

To cite this version: Hugo Bruhier, Isabelle Verrier, Thiaka Gueye, Christelle Varenne, Amadou Ndiaye, et al
The roughness of shallow or deep metallic diffraction gratings modifies the propagation of surface plasmon mode along the metallic–air interface
In most cases, the surface roughness of shallow metallic diffraction grating does not play a major role in surface plasmon resonance (SPR) losses, it induces changes in the propagation constants of the modes supported by plasmonic waveguides [3] and may strongly affect the performances of the sensor

Summary

Introduction

To cite this version: Hugo Bruhier, Isabelle Verrier, Thiaka Gueye, Christelle Varenne, Amadou Ndiaye, et al. The roughness of shallow or deep metallic diffraction gratings modifies the propagation of surface plasmon mode along the metallic–air interface.

Objectives

Results

Conclusion