Plasmonic and Nonlinear Optical Behavior of Nanostructures in Glass Matrix for Photonics application

Publication date: Available online 23 January 2020Source: Materials Research BulletinAuthor(s): Promod Kumar, Mohan Chandra Mathpal, Jai Prakash, Gangareddy Jagannath, WD Roos, H.C. SwartAbstractThere is a growing interest in bimetallic core shell nanostructures that comprised out of noble metals due to their fascinating plasmonic properties, leading to a wide range of applications in future nanotechnology. Here we report on Ag/Cu core shell nanostructures in a glass matrix. It includes novel approaches for characterizing embedded core shell nanostructures with a detailed study on the nanosize effect in tuning their optical and nonlinear optical properties along with biomedical applications. Annealing the Ag/Cu as- exchanged samples resulted in the formation of core-shell nanostructures, which were confirmed using UV-visible absorption spectroscopy and high-resolution transmission electron microscopy. The prepared plasmonic nanostructures were further studied using X-ray diffraction, Rutherford backscattering, photoluminescence, Raman, X-ray photoelectron spectroscopy and Z scan techniques. The nonlinear optical properties of the glasses containing bimetallic nanoparticles have been studied at a non-resonant wavelength using femtosecond laser pulses and a possible mechanism for the observed nonlinearity have been explained.Graphical abstractSchematic diagram depicting Ag/Cu core - shell nanostructures in glass
Source: Materials Research Bulletin - Category: Materials Science Source Type: research