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

Autor:	B. N. Shivananju, Siva Umapathy, Gagandeep Singh, G. Sreevidya Varma, Sai Siva Gorthi, Sivakumar Gayathri, Sundarrajan Asokan, S. Sridevi
Rok vydání:	2017
Předmět:	PHOSFOS Materials science Band gap Chalcogenide Chalcogenide glass 02 engineering and technology medicine.disease_cause 01 natural sciences chemistry.chemical_compound Optics Fiber Bragg grating 0103 physical sciences medicine Electrical and Electronic Engineering Thin film Instrumentation 010302 applied physics business.industry Mechanical Engineering 021001 nanoscience & nanotechnology Wavelength chemistry Optoelectronics 0210 nano-technology business Ultraviolet
Zdroj:	International Journal of Optomechatronics. 11:27-35
ISSN:	1559-9620 1559-9612
DOI:	10.1080/15599612.2017.1374490
Popis:	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.
Databáze:	OpenAIRE
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