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14 May 2019 Time-resolved studies of the diamond-to-graphite transition induced by a short-wavelength free-electron laser radiation (Conference Presentation)
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Abstract
XUV pulses at 26.2 nm wavelength were applied to induce graphitization of diamond through a non-thermal solid-to-solid phase transition. This process was observed within poly-crystalline diamond with a time-resolved experiment using ultrashort XUV pulses and cross correlated by ultrashort optical laser pulses. This scheme enabled for the first time the measurement of a phase transition on a timescale of ~150 fs. Excellent agreement between experiment and theoretical predictions was found, using a dedicated code that followed the non-equilibrium evolution of the irradiated diamond including all transient electronic and structural changes. These observations confirm that ultrashort XUV pulses can induce a non-thermal ultrafast solid-to-solid phase transition on a hundred femtosecond timescale.
Conference Presentation
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sven Toleikis, Franz Tavella, Hauke Höppner, Victor Tkachenko, Nikita Medvedev, Flavio Capotondi, Torsten Golz, Yun Kai, Michele Manfredda, Emanuele Pedersoli, Mark J. Prandolini, Nikola Stojanovic, Takanori Tanikawa, Ulrich Teubner, and Beata Ziaja "Time-resolved studies of the diamond-to-graphite transition induced by a short-wavelength free-electron laser radiation (Conference Presentation)", Proc. SPIE 11035, Optics Damage and Materials Processing by EUV/X-ray Radiation VII, 1103508 (14 May 2019); https://doi.org/10.1117/12.2523139
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