Tuning Surface Plasmon Resonance Peak of Glass Containing Metallic Nanoparticles

Abstract

Abstract Recent development in various host glasses has a beneficial feature for its application in optical devices. This present work is done by incorporating TiO2 metallic nanoparticles (NPs) in glass matrix due to their surface roughness and plasmonic properties as well as to overcome the limitation of rare earth ions in stimulating emission. A series of tellurite glass is prepared with composition of (70-x-y)TeO2-2ÜZnO-9Na2O-1Er2O3-(x)TiO2, where x= 0, 0.1, 0.2 and 0.3 mol% via melt-quenching method. In addition, glass batch without erbium content is prepared in order to identify the presence of surface plasmon resonance (SPR) peak of metallic nanoparticles. Glass samples are characterized by using X-ray diffraction (XRD), Ultraviolet-Visible spectroscopy (UV-Vis) and Transmission electron microscopy (TEM). XRD pattern confirms the amorphous structure of glass. UV-VIS spectra of glass with erbium content shows the appearance of seven absorbance peaks represent the transitions of erbium ion from ground state to excited state. Glass sample without erbium content shows the appearance of plasmon peak in range of 554 nm to 555 nm due to contribution of titanium nanoparticles. TEM image confirmed the presence of titanium NPs with Gaussian distribution having mean aspect ratio of 1.5.