Lasers, Optics & Photonics

Transition metal oxides (TMO) is an interesting group of solid materials with a wide variety of structural, optical, electrical and magnetic properties.The general formulae of transition metal oxides MnO2n±1 where M represents the transition metal. They have two dimensional vander-Waal’s bonded layered structures (Ex:V2O5,MoO3) or three dimensional frame work tunnel structures (Ex:WO3, LiCoO2) which lead the materials for their applications in the field of Electrochromic and Opto Electronic Devices. The combination of solid state materials science with thin film technology has significantly reduced the size of component and leads to micro electronic, micro ionic, electrochromic devices and display systems. Thin film deposition consists of three major phases. In the first phase, the material should be in the proper form to deposit. In the second stage, it was transported through the medium and in the third stage it should deposit on the substrate to form a continuous film. The films can be prepared by various physical vapour deposition techniques like thermal, electron beam, sputtering, so on and chemical vapour deposition techniques like solgel, spin coating, spray pyrolisis so on. Depending on the deposition parameters one can deposit amorphous, polycrystalline and nanocrystalline thin films for their effective utilisation in emerging technology. These films will be characterized for their composition, structure, morphology, vibrational and optical studies by using x-ray photo electron spectroscopy, x-ray diffraction, atomic force microscopy, infrared spectroscopy, Raman spectroscopy and UV-VIS spectroscopy.