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キーワード:
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要旨:
Highest purity CaF2 single crystals are irreversibly modified when
irradiated with millions of pulses of 193 nm light at fluences of 120
mJ/cm(2). Mie theory explains the observed haze by attributing the
wavelength dependent extinction and the ratio between absorption and
scattering to metallic colloids with radii in the range of 20 to 30 nm
and a fractional volume of up to 2.8 . 10(-7). Non-contact scanning
force microscopy (NC-AFM) measurements performed on a surface produced
by in-vacuo cleavage reveals that laser irradiation additionally
produces a 10(4) times higher volume density of colloids with a radius
of 1 to 2 nm. (C) 2011 American Institute of Physics. [doi:
10.1063/1.3673301]
