Alex Mathew Optical absorption studies in ion implanted and amorphous semiconductors : investigations in some tetrahedrally co-ordinated and chalcogenide materials - Kochi Dept. of Instrumentation - CUSAT 2004 - 176p. Guide: Madhusoodanan, K.N.Thesis (Ph.D), CUSAT, 2004 Subjects--Index Terms: Amorphous compounds Chalcognide materials Guide: Madhusoodanan, K.N. Universal Decimal Class. No.: 544.23.022:543.4 / ALE