Electrochemical modulation enhancing the saturation absorption of polyaniline

2021 ◽  
Vol 118 ◽  
pp. 111272
Author(s):  
Xiangyun Gao ◽  
Yanhui Sun ◽  
Hui Li ◽  
Jie Dong ◽  
Zhipeng Huang ◽  
...  
Keyword(s):  
Saturation Absorption

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.

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 Influence of Preparation Method on the Structural, Linear and Nonlinear Optical Properties of TiN Nanoparticles

2021 ◽  
Author(s):  
Mahdi Safa ◽  
Yasser Rajabi ◽  
Mahdi Ardyanian
Keyword(s):  
Optical Properties ◽  
Titanium Nitride ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Tin Nanoparticles ◽  
Vis Spectroscopy ◽  
Optical Applications ◽  
Co Precipitation ◽  
Optical Behavior ◽  
Saturation Absorption

Abstract In this paper, titanium nitride nanoparticles were prepared in three methods, In the first method, titanium nitride nanoparticles were prepared by the Ball-mill method; in the second and third methods, the nanoparticles were synthesized by the sol-gel, and the co-precipitation methods. The samples were characterized by X-ray diffraction (XRD), UV-Vis spectroscopy, and scanning electron microscopy (SEM), for the study of structural, linear optical properties, and surface morphology study, respectively. The Z-scan technique was utilized to study the TiN nanoparticles nonlinearity. A change in nonlinear optical behavior with an increase in input pump power and concentration of the TiN nanoparticles was observed. Results showed that the TiN nanoparticles give new potentials in nonlinear optical applications. The nonlinear optical behavior of the TiN nanoparticles shifts from inverse saturation absorption to saturation absorption with increase of intensity.

scholarly journals Evaluation of the mechanical characteristics of hygrothermally aged 2-D basalt-aramid/epoxy hybrid interply composites

2021 ◽  
Vol 2070 (1) ◽  
pp. 012234
Author(s):  
Yogeesha Pai ◽  
Dayananda Pai K ◽  
M Vijaya Kini
Keyword(s):  
Mechanical Properties ◽  
Moisture Absorption ◽  
Mechanical Performance ◽  
Mechanical Tests ◽  
Moisture Uptake ◽  
Molding Process ◽  
Micro Cracks ◽  
Different Types ◽  
Temperature Ageing ◽  
Saturation Absorption

Abstract Polymer composites used in outdoor applications are exposed to environmental factors such as temperature and moisture which may affect the mechanical performance of the composites. In this study, the influence of moisture absorption on the mechanical properties of basalt-aramid/epoxy hybrid interply composites were evaluated. Two different types hybrid interply composites were taken for the investigation namely (301 A/03 B/301 A) and (451 A/03B/451 A). Composites were prepared using compression molding process and cut specimens were subjected to three different ageing environments for 180 days. Selected ageing conditions are, (i) ambient temperature ageing (ii) Sub-zero temperature ageing (−10°C) and (iii) Humid temperature ageing (40°C and 60% Relative humidity). Mechanical tests of the aged composites were carried out to analyse the behaviour of the composites. Moisture uptake of the specimens follow Fick’s law of diffusion with saturation absorption of 5.44%, 3.12% and 1.80% for ambient, sub-zero and humid specimens respectively. Results revealed that (301 a/03 B/301 a) aged composites possess higher mechanical properties compared to (451 a/03 B/451 a) aged composites. Highest reduction in properties were observed in ambient aged specimens followed by humid and sub-zero specimens. Scanning electron microscopy (SEM) was employed to observe the damage modes of the fractured specimens. Matrix deterioration, micro cracks and fibre fracture were the major types of failures observed in aged laminates.

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.

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