జర్నల్ ఆఫ్ అడ్వాన్స్‌డ్ కెమికల్ ఇంజనీరింగ్

నైరూప్య

Effect of Incident FS Laser Power onto Gold Thin Films Deposited by PLD Techniques

Atwee T, Khedr MA, Fathy N and Badr Y

Gold thin films with different incident femtosecond laser power were elaborated by pulsed laser deposition techniques (PLD) in order to evaluate the effect of incident femtosecond laser pulse onto the formation and the homogeneity of the deposited thin films. The laser pulses that are used for this study are 800 nm wavelength, 20 fs pulse duration time and the repetition rate 1 kHz. The data of thin films were carried at incident femtosecond laser power 400, 500, 600 and 750 mW, pressure 0.3 m Torr and target substrate distance 6.5 cm. Glass substrate kept at temperature 200°C during the deposition time are used. The deposited Au thin films are characterized by atomic force microscopy (AFM), scanning electron Microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The experimental data shows a nice formed gold films with developing of particle shape and size which increases with the increasing the average of the incident femtosecond laser pulse. The results also show that, at 400 mW femtosecond laser power the practical density is increased to 60 particles μm² (the number of particles in μm²) and is fixed at laser power 500 and 600 mW while are decreased at laser power 750 mW.