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Open AccessArticle

Extreme Energy Density Confined Inside a Transparent Crystal: Status and Perspectives of Solid-Plasma-Solid Transformations

1
Laser Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra ACT 2601, Australia
2
Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn VIC 3122, Australia
*
Authors to whom correspondence should be addressed.
Nanomaterials 2018, 8(7), 555; https://doi.org/10.3390/nano8070555
Received: 26 June 2018 / Revised: 17 July 2018 / Accepted: 19 July 2018 / Published: 21 July 2018
(This article belongs to the Special Issue Laser-Based Nano Fabrication and Nano Lithography)
It was demonstrated during the past decade that an ultra-short intense laser pulse tightly-focused deep inside a transparent dielectric generates an energy density in excess of several MJ/cm3. Such an energy concentration with extremely high heating and fast quenching rates leads to unusual solid-plasma-solid transformation paths, overcoming kinetic barriers to the formation of previously unknown high-pressure material phases, which are preserved in the surrounding pristine crystal. These results were obtained with a pulse of a Gaussian shape in space and in time. Recently, it has been shown that the Bessel-shaped pulse could transform a much larger amount of material and allegedly create even higher energy density than what was achieved with the Gaussian beam (GB) pulses. Here, we present a succinct review of previous results and discuss the possible routes for achieving higher energy density employing the Bessel beam (BB) pulses and take advantage of their unique properties. View Full-Text
Keywords: light-matter interaction; ultra-short laser pulses; high-pressure/density conditions; phase transitions light-matter interaction; ultra-short laser pulses; high-pressure/density conditions; phase transitions
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MDPI and ACS Style

Gamaly, E.G.; Juodkazis, S.; Rode, A.V. Extreme Energy Density Confined Inside a Transparent Crystal: Status and Perspectives of Solid-Plasma-Solid Transformations. Nanomaterials 2018, 8, 555.

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