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[M] Refractive index reduction at the surface of Co/Cu-doped silicate glasses induced by femto-second laser irradiation オンラインリソース

著者: (出版日: 2005-04-01)

コレクション: NIMS成果物
形態: オンラインリソース オンラインリソース
言語: English
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Femto-second laser pulses (800nm, 11nJ/pulse, 82MHz) were
irradiated on the surface of Co- or Cu-doped silicate glasses
(70SiO2-20NaO2-10Al2O3 doped with 20 mol% of CoO or CuO,
respectively) for 1 second to modify its surface, which was observed by
a scanning probe microscope and an ellipsometer. Some samples exhibited
refractive index reduction without any structural modification, which
was brought about by local increase in fictive temperature through spot
heating and quenching. With the aid of a computer simulation using a
finite element method, such a modification is found to occur when the
maximum surface temperature is less than 1000 degC for the Cu-doped
glass.