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Formation of nano-voids in transparent dielectrics by femtosecond lasers
Eugene G. Gamaly,Saulius Juodkazis,Hiroaki Misawa,Barry Luther-Davies,Andrei V. Rode,Ludovic Hallo,Philippe Nicolai,Vladimir T. Tikhonchuk 한국물리학회 2008 Current Applied Physics Vol.8 No.3,4
Formation of three-dimensional (3D) patterns of 0.20.5l m diameter voids inside a transparent solid has been demonstrated.The nano-voids could be created with a spacing. 2 l m thus suggesting the possibility of permanent 3D optical memory with density. 100 Gbit/cm3. Extremely high pressures of. 10 TPa and temperatures up to 105 K can be produced by a single sub-picosecondlaser pulse tightly focused inside transparent dielectrics. Analysis of the size of the void and the shock aected zone as a functionof the deposited energy shows that the experimental results can be explicitly understood on the basis of conservation laws and beand laser parameters.