Effect of Thickness and Thermal Annealing on Optical Properties of Sb Thin films

Antimony (Sb) films are fabricated by depositing (Sb) on glass substrates at room temperature by the method of vacuum evaporation with thickness (0.25 and 0.51m), with rate of deposition equal to (2.77Å/sec), the two samples are annealed in a vacuum for one hour at 473K. The optical constants which are represented by the refractive index (n), extinction coefficient (k) were determined from transmittance spectram in the near Infrared(2500-3500 )nm regions. The tests have been shown that the optical energy gap increases with increasing of annealing temperature for the two samples