Synthesis of Organic Nanofibers, for Non Linear Optical (NLO) applications.

Abstract

LASERs are one of the most important optical devices used in our society. This device has been implemented & is found in our day to day activities, and has many advantages and limitations. Since lasers can be too powerful for an ordinary human to handle, there have been many studies and research work done since the advent of the device, to reduce the risk of using them, and to maximize its capabilities. Most phenomenon that gets directly affected due to the lasers can be categorized into Nonlinear optics. One of these phenomenon, is Nonlinear absorption, where absorption changes nonlinearly with respect to the incident laser beam. Some materials, increase or decrease its absorption nonlinearly, and these specific materials can be used to either amplify, or dampen the laser output for various uses.In my thesis, Nanofibers of PVA(Polyvinyl Alcohol)-Urea, were prepared using electrospinning method and the characteristic studies were done using SEM, XRD, FTIR, and Linear & Nonlinear absorption were studied using UV-Vis spectroscopy and open aperture z scans. In the end I try to see whether Urea, as a part of the Polymer matrix, has the possibility to exhibit third-order nonlinear optics.