S. Jeyaram, S. Hemalatha, T. Geethakrishnan
2020
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23
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Journal
Chemical Physics Letters
Abstract
Abstract Nonlinear refraction, absorption and optical power limiting properties of an anthraquinone dye (disperse blue 14) in water have been investigated using 635 nm diode laser by Z-scan technique. Disperse blue 14 dye shows a negative nonlinear index of refraction of −2.96 × 10−7 cm2/W and an efficient reverse saturable absorption characteristics with a nonlinear absorption coefficient of 2.04 × 10−3 cm/W in the present experimental conditions. Optical power limiting characteristics are observed for disperse blue 14 dye with a low limiting threshold of 1.77 × 102 kW/cm.