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In situ monitoring of photostriction in chalcogenide glass film using fiber Bragg grating sensors

Gayathri, Sivakumar and Varma, G Sreevidya and Singh, Gagandeep and Shivananju, Bannur Nanjunda and Sridevi, S and Umapathy, Siva and Gorthi, Sai Siva and Asokan, Sundarrajan (2017) In situ monitoring of photostriction in chalcogenide glass film using fiber Bragg grating sensors. In: INTERNATIONAL JOURNAL OF OPTOMECHATRONICS, 11 (1). pp. 27-35.

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Official URL: http://dx.doi.org/10.1080/15599612.2017.1374490

Abstract

The reversible photostriction (photomechanical strain) in Ge35S65 chalcogenide thin film deposited by a solvent casting method has been monitored using a fiber Bragg grating (FBG) sensor. The shift in Bragg wavelength is used as a probing parameter to quantitatively measure the photoinduced strain arising because of structural modifications in these films under illumination. Exposure to band gap light (405 nm) and above band gap light (302 and 254 nm) leads to a reversible photostriction effect of the order of 100 mu epsilon. The present study shows that FBG sensors can be used to effectively measure the optomechanical actuation in chalcogenide films caused by the reversible photostriction effect in the visible and ultraviolet wavelength region.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the TAYLOR & FRANCIS INC, 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Date Deposited: 13 Jan 2018 05:28
Last Modified: 13 Jan 2018 05:28
URI: http://eprints.iisc.ernet.in/id/eprint/58622

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