Author:
Fakher Alfahed R. K.,Badran Hussain Ali,Abbas Abu Talib Y.,Saleh Noor Al-Huda
Abstract
Abstract
The concentrations-dependent refractive index n
2 and the nonlinear absorption coefficient β of Ethidium bromide dye-doped deoxyribonucleic acid (biological polymer DNA) solutions in the SDL regime at 532 nm are reported. The Z-scan technique was performed in two ways and two different wavelengths, 532nm and 473nm, the open aperture technique and the closed aperture technique. From open aperture Z-scan measurements it is found that the Ethidium bromide doped deoxyribonucleic acid films exhibited reverse saturable absorption. The coefficient of nonlinear refraction and nonlinear absorption coefficient at 473nm wavelength is greater than at 532nm.
Subject
General Physics and Astronomy
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