Z-scan and optical limiting properties of Hibiscus Sabdariffa dye

The intensity-dependent refractive index n 2 and the nonlinear susceptibility χ (3) of Hibiscus Sabdariffa dye solutions in the nanosecond regime at 532 nm are reported. More presicely, the variation of n 2 , β , and real and imaginary parts of χ (3) versus the natural dye extract concentration has...

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