Study Of The Variation Of The Optical Properties Of Nano-Gaas Coating With Particle Size

In this work, the optical properties of nano-GaAs coating are studied as a function of its particle size. Bulk Si is used as a basis for multi-layer optical reflection of nano-GaAs coating. This study is done by using a program performed in Matlab software, aiming to calculate the variation in reflectivity of the perpendicular and oblique incident light at wavelength of 1064 nm with particle size, refractive index and energy gap of the coated multi-layer. This program is based on the Brus model and characteristic matrix theory. The results show that the reflectivity of Air/Si/Nano-GaAs/Si design, with particle size P-s which equal is to 3.6 nm is (Rs = 100%, Rp = 99:8%), approximately for oblique incidence at 45 degrees and R = 99:98% for a perpendicular incidence. Given such a high reflectivity gained by this design, this study makes a major contribution to the field of fabricating Nd-YAG laser resonators.