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Laser-Induced Microexplosion Confined in the Bulk of a Sapphire Crystal: Evidence of Multimegabar Pressures

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Title: Laser-Induced Microexplosion Confined in the Bulk of a Sapphire Crystal: Evidence of Multimegabar Pressures
Authors: Juodkazis, S. Browse this author
Nishimura, K. Browse this author
Tanaka, S. Browse this author
Misawa, H. Browse this author →KAKEN DB
Gamaly, E. G. Browse this author
Luther-Davies, B. Browse this author
Hallo, L. Browse this author
Nicolai, P. Browse this author
Tikhonchuk, V. T. Browse this author
Issue Date: 28-Apr-2006
Publisher: American Physical Society
Journal Title: Physical Review Letters
Volume: 96
Issue: 16
Start Page: 166101-1
End Page: 166101-4
Publisher DOI: 10.1103/PhysRevLett.96.166101
PMID: 16712248
Abstract: Extremely high pressures (~10 TPa) and temperatures (5×10^5 K) have been produced using a single laser pulse (100 nJ, 800 nm, 200 fs) focused inside a sapphire crystal. The laser pulse creates an intensity over 10^14 W/cm^2 converting material within the absorbing volume of ~0.2 µm^3 into plasma in a few fs. A pressure of ~10 TPa, far exceeding the strength of any material, is created generating strong shock and rarefaction waves. This results in the formation of a nanovoid surrounded by a shell of shock-affected material inside undamaged crystal. Analysis of the size of the void and the shock-affected zone versus the deposited energy shows that the experimental results can be understood on the basis of conservation laws and be modeled by plasma hydrodynamics. Matter subjected to record heating and cooling rates of 10^18 K/s can, thus, be studied in a well-controlled laboratory environment.
Rights: Copyright © 2006 American Physical Society
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Juodkazis Saulius(ヨードカジス サウルース)

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