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Home List of Titles Laser-matter interaction in the bulk of a transparent solid: confined microexplosion and void formation
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/193682
- Laser-matter interaction in the bulk of a transparent solid: confined microexplosion and void formation
- Gamaly, Eugene G.; Juodkazis, Saulius; Nishimura, Koichi; Misawa, Hiroaki; Luther-Davies, Barry; Hallo, Ludovic; Nicolai, Philippe; Tikhonchuk, Vladimir T.
- We present here the experimental and theoretical studies of a single femtosecond laser pulse interaction inside a bulk of transparent media (sapphire, glass, polymer). This interaction leads to the drastic transformations in a solid resulting in a void formation inside a dielectric. The laser pulse energy is absorbed within a volume of approximately 0.15 μm3 creating a pressure and temperature comparable to that in the core of a strong multi-kilo-tons explosion. The material within this volume is rapidly atomized, ionized, and converted into a tiny super-hot dense cloud of expanding plasma that generates strong shock and rarefaction waves which result in the formation of a void, whose diameter is ∼200 nm (for a 100 nJ pulse in sapphire). The way this structure forms can be understood from high-temperature plasma hydrodynamics. We demonstrate that unique states of matter characterized by temperatures ∼105 K, heating rates up to the 1018 K∕s, and pressures more than 100 times the strength of any material were created using a standard table-top laser in well-controlled laboratory conditions. We discuss the properties of the laser-affected solid and possible routes of laser-affected material transformation to the final state long after the pulse end. These studies will find application for the design of new materials and three-dimensional optical memory devices, and for formation of photonic band-gap crystals.
- Publication type
- Journal article
- Physical Review B: Condensed Matter and Materials Physics, Vol. 73, no. 21 (Jun 2006), article no. 214101
- Publication year
- FOR Code(s)
- 01 Mathematical Sciences; 02 Physical Sciences; 09 Engineering
- Dielectrics; Femtosecond laser pulses; Laser-matter interaction; Microexplosions; Temperature; Transparent solids; Void formation
- American Physical Society
- Publisher URL
- Copyright © 2006 The American Physical Society.
- Additional information
- The authors acknowledge support from the Australian Research Council.
- Peer reviewed