Plasmonic Effect of Gold Nanoparticles Surrounded by Multidielectric Matrices

Abdul Rauf Jamali; Ali Dad Chandio; Waseem Khan; Zubia Anwer; Imtiaz Ali Soomro

doi:10.22581/muet1982.1703.28

Abdul Rauf Jamali Department Metallurgical Engineering, NED University of Engineering and Technology, Karachi.
Ali Dad Chandio Department Metallurgical Engineering, NED University of Engineering and Technology, Karachi
Waseem Khan Department Metallurgical Engineering, NED University of Engineering and Technology, Karachi
Zubia Anwer Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro.
Imtiaz Ali Soomro Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro

DOI: https://doi.org/10.22581/muet1982.1703.28

Abstract

Plasmonic materials are the artificially manufactured materials (metamaterials) typically composed of nanostructure noble metals which give the unique optical properties superior to naturally occurring materials. Such plasmonic material has ability to give surface plasmon when electromagnetic light wave interact with free electrons in conduction band of the noble metals. Entirely absorption of light wave is the one of the major property of such plasmonicmetamaterials. Recently, these metamaterials has drawn the attention of scientists because of its wide range of applications in harvesting energy and sensors. These applications are strongly dependent on adjusting the absorption band-width, peak position and absorption intensity. In this work we show that using ultra-thin multicomponent (i.e. Au NPs incorporated in mixture of SiO₂ and TiO₂ matrix) nanocomposite deposited on optically thick gold film through subsequent magnetron sputtering. Experimental results show that one can broaden the bandwidth and peak position to span Ultraviolet up to near infrared wavelength range.