Reverse saturation absorption spectra and optical limiting properties of chlorinated tetrasubstituted phthalocyanines containing different metals

2012 ◽  
Vol 34 (11) ◽  
pp. 1869-1877 ◽  
Author(s):  
Ahmad Tuhl ◽  
Hacene Manaa ◽  
Saad Makhseed ◽  
Nouria Al-Awadi ◽  
Jacob Mathew ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Optical Limiting ◽  
Reverse Saturation Absorption ◽  
Saturation Absorption

Ultrafast broadband reverse saturation absorption in Al-doped InSe thin films for optical limiting at visible/near-infrared

2020 ◽  
Vol 108 ◽  
pp. 110171 ◽  
Author(s):  
Xiaoyan Yan ◽  
Xingzhi Wu ◽  
Yu Fang ◽  
Wenjun Sun ◽  
Chengbao Yao ◽  
...  
Keyword(s):  
Thin Films ◽  
Near Infrared ◽  
Optical Limiting ◽  
Reverse Saturation Absorption ◽  
Saturation Absorption

scholarly journals SOME ASPECTS OF THE MATERIALS’ OPTICAL LIMITING FEATURES

2020 ◽  
Vol 1 ◽  
pp. 33-36
Author(s):  
Natalia Kamanina
Keyword(s):  
High Frequency ◽  
Kerr Effect ◽  
Optical Limiting ◽  
Reverse Saturation Absorption ◽  
High Laser ◽  
Effective Use ◽  
Human Eyes ◽  
Saturation Absorption ◽  
Display Technique ◽  
Good Coincidence

Due to the effective use of the fullerenes and other nanoparticles in the materials for the general optoelectronic, laser and display technique, as well as for biomedicine, the different mechanisms to attenuate the light intensity are considered with good advantage in order to protect the human eyes and technical devises from high laser irradiation. Reverse saturation absorption, complex formation, scattering, etc. are taken into account. In the current paper the influence of the content of the nanoobjects on the interface relief is shown and considered as an additional possible optical limiting mechanism. Moreover, the diffraction from the nanostructured materials via high frequency Kerr effect is added to extend the numbers of the optical limiting mechanisms. Different experimental instruments and supporting models are presented. VIS lasers, AFM, OCA devises are applied to test and visualize the results. Theoretical and experimental data are in good coincidence.

OPTICAL AND STRUCTURAL PROPERTIES OF SILVER NANOPARTICLES EMBEDDED IN INDIUM OXIDE FILMS

2011 ◽  
Vol 10 (03) ◽  
pp. 433-440 ◽  
Author(s):  
A. A. DAKHEL ◽  
F. Z. HENARI
Keyword(s):  
Indium Oxide ◽  
Nonlinear Optical ◽  
Silicon Substrates ◽  
X Ray Diffraction ◽  
Third Order ◽  
X Ray ◽  
Reverse Saturation Absorption ◽  
Saturation Absorption ◽  
Order Susceptibility ◽  
Nanoparticles Of Silver

Nanoparticles of silver-embedded indium oxide thin films have been prepared on glass and silicon substrates. Silver concentration were 3 wt.% and 5 wt.% as measured by X-ray fluorescence. X-ray diffraction reveals that indium oxide of these samples remains amorphous even after pre-annealing at 400°C. The optical absorption of the samples manifests the surface plasmon resonance (SPR) phenomena, which varies with Ag content. The Ag nanoparticles radius was estimated with Mie classical theory by using the SPR data analysis. The nonlinear optical properties of films on glass substrate were investigated using z-scan technique. Under cw excitation the films exhibit large reverse saturation absorption and negative nonlinearities. The real and imaginary parts of third order susceptibility of the samples were measured and the imaginary part which arise from the change in absorption is found to be dominant.

scholarly journals Nonlinear Optical Characteristics of Crystal VioletDye Doped Polystyrene Films by Using Z-Scan Technique

2017 ◽  
Vol 27 (5) ◽  
pp. 83 ◽  
Author(s):  
Mahasin F. Hadi ◽  
Eman Mohi Alwaan ◽  
Wafaa Hameed Abass
Keyword(s):  
Nonlinear Optical ◽  
Laser Light ◽  
Nonlinear Refraction ◽  
Closed Aperture ◽  
Experimental Conditions ◽  
Light Pulses ◽  
Reverse Saturation Absorption ◽  
Self Focusing ◽  
Saturation Absorption ◽  
Doping Ratio

Z-scan technique was employed to study the nonlinear optical properties (nonlinear refractive index and nonlinear absorption coefficient) for crystal violet doped polystyrene films as a function of doping ratio in chloroform solvent. Samples exhibits in closed aperture Z-scan positive nonlinear refraction (self-focusing). While in the open aperture Z-scan gives reverse saturation absorption (RSA) (positive absorption) for all film with different doping ratio making samples candidates for optical limiting devices for protection of sensors and eyes from energetic laser light pulses under the experimental conditions.

Nonlinear absorption spectra of transparent organic crystals for optical limiting applications at visible wavelengths

2000 ◽  
Vol 115 (1-3) ◽  
pp. 265-268 ◽  
Author(s):  
Y Morel ◽  
A Ibanez ◽  
C Nguefack ◽  
C Andraud ◽  
A Collet ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Nonlinear Absorption ◽  
Optical Limiting ◽  
Organic Crystals ◽  
Visible Wavelengths

scholarly journals Evidence of tumbling multiplets in saturation absorption spectra of SiF_4

1979 ◽  
Vol 4 (3) ◽  
pp. 90 ◽  
Author(s):  
William G. Harter ◽  
Howard P. Layer ◽  
F. R. Petersen
Keyword(s):  
Absorption Spectra ◽  
Saturation Absorption

Study of molecular aggregation effects on the nonlinear refractive index and absorption of Oxazin 720 laser dye

2016 ◽  
Vol 94 (9) ◽  
pp. 834-838 ◽  
Author(s):  
Karim Milanchian ◽  
Habib Tajalli ◽  
Zahra Eyni ◽  
Mohammad Sadegh Zakerhamidi
Keyword(s):  
Aqueous Solution ◽  
Refractive Index ◽  
Organic Solvents ◽  
Nonlinear Refractive Index ◽  
Focal Point ◽  
Nonlinear Behavior ◽  
Dye Molecules ◽  
Laser Dye ◽  
Reverse Saturation Absorption ◽  
Saturation Absorption

In this experimental work, nonlinear optical properties of Oxazine 720 laser dye in acetone, dimethyl sulfoxide, ethanol, and water were studied using the z-scan method. It is found that the nonlinear behavior of Oxazine 720 dye in water is different from other organic solvents. The magnitude of the nonlinear refractive index was obtained in the order of 10−8 and 10−7 cm2/W for the 0.2 mmol/L solutions of this dye in water and other solvents, respectively. Also, it was observed that, in the aqueous solution, reverse saturation absorption occurs while, in other organic solvents, saturation absorption occurs and, near the focal point of the lens, it is converted to reverse saturation absorption. These differences in the nonlinear refractive index and nonlinear absorption changes of aqueous solution and other solutions may be due to strong aggregative behavior of dye molecules in water.

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