title: Formation of subwavelength grating on molybdenum mirrors using a femtosecond Ti:sapphire laser system operating at 10 Hz.
abstract: We report formation of subwavelength surface grating over large surface area of molybdenum mirror by multiple irradiation of amplified femtosecond laser pulses from a homemade Ti:sapphire oscillator-amplifier laser system in a raster scan configuration. The laser system delivered 2 mJ, 80 fs duration laser pulses at a pulse repetition rate of 10 Hz. Various parameters such as pulse fluence, number of pulses, laser polarization, scan speed, and scan steps were optimized to obtain uniform subwavelength gratings. Energy dispersive x-ray spectroscopy measurements were conducted to analyze the elemental composition of mirror surfaces before and after laser treatment.
authors: Instrumentation Division, Brookhaven National Laboratory, Upton, New York 11973, USA. dravnishsharma@gmail.com
authors: Avnish Kumar
authors: AK
authors: Sharma
authors: John
authors: J
authors: Smedley
authors: Thomas
authors: T
authors: Tsang
authors: Triveni
authors: T
authors: Rao