Tunable Edge Filter as a Smart Energy Saving Window at the Hot Climates of the Baha Region in the Kingdom of Saudi Arabia

Abstract

This Study demonstrated a design of one-dimensional photonic crystal (PC) structure consisting of alternate layers of Silicon dioxide (Sio2) and Tantalum pentoxide (Ta2O5) that blocks infrared light and passes only light of short wavelengths. Results show a new design for optimal edge filter of optical shortwave pass (SWP) filter that can be used as a smart energy saving window. Alaqiq and Almakhwah are hot climate provinces at Albaha region in Kingdom of Saudi Arabia. They have been taken as examples for this study. The design was done with the computational help of optimization using the "Essential Macleod" software. The mean polarized light mode has been contained a transmittance greater than 98% in both summer and winter solstices in the visible region and more than 40% of the amount of sun energy has entered in winter from the infrared region which has been reflected (stopped) in summer. That results in a 0.025-0.175 µm photonic band gap (PBG) shift in the direction of short wavelengths by increasing the angle of incidence.