Comparison of transient thermal conduction in tellurium and organic dye based digital optical storage media

Abstract

Considerable research and development has been done, in recent years, on combinations of optically absorbing thin films and substrates for digital optical storage media. Recent theoretical models have considered the formation of pits, by laser heating, in such media in two stages: (i) a preinitiation stage before pit formation; (ii) a pit growth stage. To compare the validity of suggested mechanisms for initiation accurate temperature calculations are required. In this paper the full transient thermal conduction equation is solved by finite element methods for both a tellurium and an organic dye layer system and the results compared.