Nanoindentation studies on waveguides inscribed in chalcogenide glasses using ultrafast laser

Sabapathy, Tamilarasan and Kiran, MSRN and Ayiriveetil, Arunbabu and Kar, Ajoy K and Ramamurty, U and Asokan, Sundarrajan (2013) Nanoindentation studies on waveguides inscribed in chalcogenide glasses using ultrafast laser. In: Optical Materials Express, 3 (6). pp. 684-690.

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Abstract

Optical straight waveguides are inscribed in GeGaS and GeGaSSb glasses using a high repetition-rate sub-picosecond laser. The mechanical properties of the glasses in the inscribed regions, which have undergone photo induced changes, have been evaluated by using the nanoindentation technique. Results show that the hardness and elastic modulus of the photo-modified glasses are significantly lower as compared to the other locations in the waveguide, which tend to be similar to those of the unexposed areas. The observed mechanical effects are found to correlate well with the optical properties of the waveguides. Further, based on the results, the minimum threshold values of hardness and elastic modulus for the particular propagation mode of the waveguide (single or multi), has been established.

Item Type:	Journal Article
Publication:	Optical Materials Express
Publisher:	Optical Society of America
Additional Information:	Copyright of this article belongs to Optical Society of America.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	18 Jul 2013 06:56
Last Modified:	18 Jul 2013 06:56
URI:	http://eprints.iisc.ac.in/id/eprint/46861

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