Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 33, Issue 9, Pages 2015-2019Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.33.002015
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- UGC-DAE Consortium for Scientific Research (UGC-DAE CSR) [CSR-IC/CRS-75/2014-244 15/584]
- Madhya Pradesh Council of Science and Technology (MPCST) (CST/R&D/Phys. Engg. Sc)
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Thermo-optic properties and optical limiting characteristics are investigated in pulsed laser deposited Mg-doped ZnO thin films by performing a Z-scan experiment in the off-resonant regime using a CW He-Ne laser source. Optical limiting studies in these thin films lead to a conclusion that reverse saturable absorption is the major mechanism for optical limiting properties in these films and nonlinear refraction is caused due to the thermal lensing effect. Negative thermo-optic coefficients were observed, indicating potentiality for athermalization, required to counter the effect of thermal expansion. Sufficiently large thermo-optic coefficients and good optical limiting response suggest the utility of MgZnO films for thermo-optic switches and optical limiting device applications. (C) 2016 Optical Society of America
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