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Crystals 2017, 7(2), 53; doi:10.3390/cryst7020053

Optical Properties of the Fresnoite Ba2TiSi2O8 Single Crystal

1
Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
2
State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, China
3
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Received: 1 January 2017 / Revised: 7 February 2017 / Accepted: 8 February 2017 / Published: 11 February 2017
(This article belongs to the Section Crystal Engineering)
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Abstract

In this work, using large-sized single crystals of high optical quality, the optical properties of Ba2TiSi2O8 were systematically investigated, including transmission spectra, refractive indices and nonlinear absorption properties. The crystal exhibits a high transmittance (>84%) over a wide wavelength range from 340 to 2500 nm. The refractive indices in the range from 0.31256 to 1.01398 μm were measured, and Sellmeier’s equations were fitted by the least squares method. The nonlinear absorption properties were studied by using the open-aperture Z-scan technique, with a nonlinear absorption coefficient measured to be on the order of 0.257 cm/GW at the peak power density of 16.4 GW/cm2. Such high transmittance and wide transparency indicate that optical devices using the Ba2TiSi2O8crystal can be applied over a wide wavelength range. Furthermore, the small nonlinear absorption observed in Ba2TiSi2O8 will effectively increase the optical conversion efficiency, decreasing the generation of laser damage of the optical device. View Full-Text
Keywords: transmission spectra; refractive index; nonlinear absorption; Z-scan transmission spectra; refractive index; nonlinear absorption; Z-scan
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Shen, C.; Zhang, H.; Wang, D.; Wang, J.; Boughton, R.I. Optical Properties of the Fresnoite Ba2TiSi2O8 Single Crystal. Crystals 2017, 7, 53.

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