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OPTICS EXPRESS
Volume 12, Issue 2, Pages 288-293Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPEX.12.000288
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We report the production of color centers in LiF single crystals by ultrashort high intensity laser pulses (60fs, 10 GW). An intensity threshold for color centers creation of 2 TW/cm(2) was determined, which is slightly smaller than the continuum generation threshold. We could identify a large amount of F centers that gave rise to aggregates such as F-2, F-2(+) and F-3(+). The proposed mechanism of formation is based on multiphoton excitation that also produce short lived F-2(+) centers. It is also shown that it is possible to write tracks in the LiF crystals with dimensional control. (C) 2004 Optical Society of America.
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