Refractive index reduction at the surface of Co/Cu-doped silicate glasses induced by femto-second laser irradiation

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Collection:	NIMS成果物
Form:	Online resource
Language:	English
Physical description:	4 p. (308 - 311)
Subject:	unknown: silicate glass unknown: refractive index unknown: fs-laser pulse irradiation unknown: finite element method unknown: silicate glass unknown: refractive index unknown: fs-laser pulse irradiation unknown: finite element method unknown: silicate glass unknown: refractive index unknown: fs-laser pulse irradiation unknown: finite element method
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Identifier:	Handle URI: https://hdl.handle.net/20.500.11932/33013
Full-text file	NIMS Digital Library
Abstract:	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.
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