Optical Behaviour of N[sup +] Ion Implanted CR-39 Polymer

Abstract

The 100 keV N+ ion implanted samples of CR‐39 polymer at different doses from 5×1015 to 2×1016 ions/cm2 were subjected to UV‐Visible transmission and reflection spectroscopy. After applying necessary corrections for reflection losses at the front and back surfaces, the true value of absorption coefficient and reflectance from the implanted surface have been determined. From these corrected values of absorbance and reflectance, the values of optical energy gap and refractive index have been deduced. A drastic decrease in the values of optical energy gap while a significant increase in refractive index have been observed after implantation.