A comprehensive linear and nonlinear study on a fluorescent stain

Author:

Sharba Ahmed B.1ORCID,Ahmed Rafea T.1,Haddawi S. F.1

Affiliation:

1. Department of Laser Physics, College of Science for Women, University of Babylon, Babylon, Iraq

Abstract

The optical properties, linear and nonlinear, for Leishman stain are studied in ethanol and chloroform over a wide spectral region. The stain consists of two components: Methylene blue (MB) and Eosin (E). The low intensity optical measurements, linear regime, show the absorption and emission characteristics of the E and the MB components in ethanol and only the MB component in chloroform. Under the influence of optical intensity less than 15[Formula: see text]MW/m2, the stain shows nonlinear absorption characteristics at excitation wavelengths 532[Formula: see text]nm and 650[Formula: see text]nm only. The nonlinear absorption coefficients of the solutions are in 1–12.4 [Formula: see text][Formula: see text] cm/W range in both solvents. Leishman stain solutions in ethanol and chloroform have a strong thermal nonlinearity with a negative index of refraction over the entire visible region. The value of the nonlinear refractive index ([Formula: see text]) of Leishman stain in both solvents increases as the wavelength of the excitation radiation increases. The value of [Formula: see text] of the solutions is in the range of about 2–46 [Formula: see text][Formula: see text][Formula: see text]cm2/W. As an example of the optoelectronic applications, the stain shows excellent properties of an energy spreading optical limiter.

Publisher

World Scientific Pub Co Pte Ltd

Subject

Physics and Astronomy (miscellaneous),Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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