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Control of condensation and evaporation of electron–hole liquid in diamond by femtosecond laser pulses
Author(s) -
Kozák Martin,
Trojánek František,
Popelárˇ Tomáš,
Malý Petr
Publication year - 2013
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201307030
Subject(s) - femtosecond , evaporation , electron , condensation , atomic physics , diamond , materials science , drude model , absorption (acoustics) , electron hole , ultrafast laser spectroscopy , chemical vapor deposition , molecular physics , chemistry , laser , analytical chemistry (journal) , optics , optoelectronics , physics , quantum mechanics , composite material , thermodynamics , chromatography
We demonstrate the ultrafast control of condensation and evaporation of an electron–hole liquid in diamond prepared by chemical vapor deposition. The electron–hole liquid dynamics was measured using a three‐pulse pump and probe experiment. The transient transmission changes in the presence of electron–hole drops were assigned to the increase in the Drude scattering rate in the model of free carrier absorption due to a high carrier density. The fast (∼1 ps) liquid evaporation was induced by infrared femtosecond pulses and its dynamics was investigated under different photon energies and fluences. The value of the electron–hole liquid binding energy per electron–hole pair 80 ± 40 meV determined from the measured transient transmission signal agrees well with previously published values. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)