Open AccessLinear and Nonlinear optical properties of Rhodamine 6G
Author(s) -
H. H. Obeed,
Khawla J. Tahir,
Noor J. Ridha,
Firas K. Mohamad Alosfur,
Rajaa A. Madlol
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/928/7/072024
Subject(s) - rhodamine 6g , aperture (computer memory) , optics , refractive index , materials science , attenuation coefficient , wavelength , z scan technique , saturation (graph theory) , absorption (acoustics) , dye laser , laser , numerical aperture , angular aperture , analytical chemistry (journal) , nonlinear optics , chemistry , optoelectronics , lens (geology) , physics , focal length , mathematics , fluorescence , chromatography , combinatorics , acoustics
In this study, the linear and nonlinear optical properties of laser dye R6G in methanol solvent were investigated with various concentrations (1×10 −4 , 5×10 −4 , 1×10 −5 , 1×10 −6 and 5×10 −6 mole/liter) at thickness (1mm). To study the non-linear optical properties like refractive index and absorption coefficient (β) Z-Scan technique was used in two modes, the first is the close aperture which can be done by putting the aperture in front of the detector to find the non-linear refractive index. While the second mode is the open aperture which can be obtained by removing the aperture to find non-linear absorption coefficient, using two-wavelength 532 and 1064 nm. The results show that all R6G dye concentrations exhibited self – focusing in closed aperture Z-scan in 532 nm except the (1x10 −4 mol/liter) in 1064 nm which shown a self-defocusing and the change of the effect of saturation absorption in an open aperture in both wavelength.