Formation of color centers and light scattering structures by femtosecond laser pulses in sodium fluoride

High pressure study of sodium trihydride

“…Interestingly, some NaH samples exhibited an intense photoluminescence background signal after exposure to X-ray radiation and IR laser used for heating. This can be attributed to the formation of color centers, which have previously been observed in studies of pure NaH Duclos et al (1987); Williams (1962) and reported for isoelectronic alkaline halides such as NaF (Bryukvina et al, 2014). Furthermore, whilst the samples undergo a visual color change, appearing orange after X-ray irradiation at 75 GPa (Supplementary Figure S5B [Supplementary Data]), XRD mapping of the samples showing this photoluminescence did not reveal the formation of any other product or phase transition.…”

Terahertz generation from electron- and neutron-irradiated semiconductor crystal surfaces

“…In the present study, the parameters of terahertz generation from the surfaces of InSb, InP, GaAs and GaSe crystals, native and modified by high-energy electron and neutron irradiation, are compared. well known that an energetic particle and beam irradiation of the crystal surface can greatly modify the optical and electronic properties [17][18][19][20][21][22]. Respectively, the terahertz generation intensity may be noticeably different from pure and irradiated semiconductor surfaces.…”

Features of propagation of the high-intensity femtosecond laser pulses in magnesium and sodium fluoride crystals

“…The peculiarities of the interaction between femtosecond laser radiation and wide gap ionic crystals are of broad scientific and practical interest [8][9][10][11][12].…”