Broadband tunable nonlinear optical response in plasmonic metamaterials -INVITED

Tiziana Cesca,Jorge A Reyes-Esqueda,Domenico Genchi,Raul Rangel-Rojo,Giovanni Mattei,H Michinel,M.F Costa,O Frazao

doi:10.1051/epjconf/202023811001

Abstract

Nanostructured materials with tunable nonlinear optical response are of great interest for different applications in nanophotonics. In this work we report the results of a comprehensive study on the nonlinear optical properties of two kinds of plasmonic metamaterials, i.e., honeycomb nanoprism arrays and multilayer hyperbolic metamaterials, which proved to have a very rich spectrum of parameters (as metamaterials morphology and composition, wavelength and polarization of an input beam) to exploit for controlling their nonlinear response over a broad spectral range.

Highlights

In recent years, nanomaterials with properly engineered nonlinear optical properties have been the object of an intense scientific research for their application in different fields in nanophotonics
We present the results of a comprehensive study on the nonlinear optical properties of two classes of plasmonic metamaterials, namely honeycomb, Au and Ag, nanoprism arrays (HNPA) and multilayer hyperbolic metamaterials (MHM)
Annealing treatments in air at different temperatures are used to change the morphology of the nanostructures in the plasmonic HNPA, varying their shape from triangular nanoprisms to hemispherical nanoparticles

Summary

Introduction

Nanomaterials with properly engineered nonlinear optical properties have been the object of an intense scientific research for their application in different fields in nanophotonics. Within this framework, plasmonic metamaterials have attracted considerable attention due to their strong and ultra-fast nonlinear optical (NLO) response [1] and the possibility of tailoring their nonlinear optical properties by manipulating the metamaterials nanostructure [2, 3]. We present the results of a comprehensive study on the nonlinear optical properties of two classes of plasmonic metamaterials, namely honeycomb, Au and Ag, nanoprism arrays (HNPA) and multilayer hyperbolic metamaterials (MHM). The experimental findings are compared and interpreted on the basis of the results of finite elements methods (FEM) simulations of the plasmonic properties (near-field and far-field) of the investigated nanosystems

Experimental

Results and discussion

Conclusions