scholarly journals Hybrid Ag-LiNbO3 Nanocomposite Thin Films with Tailorable Optical Properties

2021 ◽  
Author(s):  
Jijie Huang ◽  
Di Zhang ◽  
Zhimin Qi ◽  
Bruce Zhang ◽  
Haiyan Wang
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Ag Nanoparticles ◽  
Photonic Device ◽  
Device Integration ◽  
Nanocomposite Thin Films

Ag nanostructures exhibit extraordinary optical properties, which are important for photonic device integration. Here, we deposited Ag-LiNbO3 (LNO) nanocomposite thin films with Ag nanoparticles (NPs) embedded into LNO matrix, by...

scholarly journals Characterization of silver polyaniline nanocomposite thin films prepared by microwave induced plasma

2019 ◽  
Vol 13 (28) ◽  
pp. 1-9
Author(s):  
Ahmad S. Wassfi
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Band Gap ◽  
Ag Nanoparticles ◽  
Energy Band ◽  
Average Particle ◽  
Energy Band Gap ◽  
Optical Energy ◽  
Microwave Induced Plasma ◽  
Nanocomposite Thin Films

Polyaniline (PANI) and Ag/PANI nanocomposite thin films have prepared by microwave induced plasma. The Ag powder of average particle size of 50 nm, were used to prepare Ag/PANI nanocomposite thin films. The Ag/PANI nanocomposite thin films prepared by polymerization in plasma and characterized by UV-VIS, FTIR, AFM and SEM to study the effect of silver nanoparticles on the optical properties, morphology and structure of the thin films. The optical properties studies showed that the energy band gap of the Ag/PANI (5%wt silver) decreased from 3.6 to 3.2 eV, where the substrate location varied from 4.4 to 3.4 cm from the axis of the cylindrical plasma chamber. Also the optical energy gap decreased systematically from 3.3 to 3 eV with increasing Ag nanoparticles, where Ag concentration increased from 5% to 11%wt. The FTIR measurement showed a shifting in the FTIR absorption peaks with Ag concentration. AFM and SEM images indicate that there are a few clusters of Ag and there is a uniform distribution of the Ag nanoparticles in the PANI matrix. It can be concluded that Ag/PANI nanocomposite thin films with controlled optical energy band gap can be prepared by microwave induced plasma technique.

scholarly journals W:Al2O3 Nanocomposite Thin Films with Tunable Optical Properties Prepared by Atomic Layer Deposition

2016 ◽  
Vol 120 (27) ◽  
pp. 14681-14689 ◽  
Author(s):  
Shaista Babar ◽  
Anil U. Mane ◽  
Angel Yanguas-Gil ◽  
Elham Mohimi ◽  
Richard T. Haasch ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Layer Deposition ◽  
Nanocomposite Thin Films ◽  
Tunable Optical Properties

The optical properties of Ag/ZnO nanocomposite thin films with different thickness

Optik ◽  
2017 ◽  
Vol 147 ◽  
pp. 6-13 ◽  
Author(s):  
Linhua Xu ◽  
Gaige Zheng ◽  
Yuzhu Liu ◽  
Jing Su ◽  
Wenjian Kuang ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nanocomposite Thin Films ◽  
Different Thickness

Microstructure and Optical Properties of Co Sputter Deposited Si-Al Nanocomposite Thin Films

2000 ◽  
Vol 648 ◽  
Author(s):  
F. Niu ◽  
P.J. Dobson ◽  
B. Cantor
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Optical Absorption ◽  
Absorption Peak ◽  
Al Content ◽  
Al Nanoparticles ◽  
Transmission Electron ◽  
Effective Medium Theories ◽  
Nanocomposite Thin Films ◽  
Sputter Deposited

AbstractNovel Si-Al nanocomposite thin films were made by radio frequency co-sputtering of Si and Al with Al content from 0 at.% to 69 at.%. Microstructure and optical properties of the films were characterised by conventional and high resolution transmission electron microscopyand spectrometry in the wavelength range from 200 to 3000 nm. The film microstructure consisted of Al nanoparticles (2-9 nm) embedded in an amorphous Si-Al matrix. Optical absorption spectra of the films up to 50 at.% Al exhibited a sharp absorption peak below500 nm and relatively low absorption above 500 nm. In addition, the absorption peak shifted towards longer wavelengths and the general absorption above 500 nm increased remarkably as Al content increased. For the Si-69at.%Al films, however, an absorption plateau appeared between 300 nm to 700 nm and a second weak and broad absorption peak appeared at around 900 nm. The results are analysed and compared with the optical absorption predicted by various effective medium theories.

Optical Properties of Nanocomposite Thin-Films

2006 ◽  
Author(s):  
Anna Garahan ◽  
Laurent Pilon ◽  
Juan Yin ◽  
Indu Saxena
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Maxwell’S Equations ◽  
Maxwell's Equations ◽  
Volume Fraction ◽  
Effective Index ◽  
Absorption Index ◽  
Index Of Refraction ◽  
Nanocomposite Thin Films ◽  
Effective Index Of Refraction

This paper aims at developing numerically validated models for predicting the through-plane effective index of refraction and absorption index of nanocomposite thin-films. First, models for the effective optical properties are derived from previously reported analysis applying the volume averaging theory (VAT) to the Maxwell's equations. The transmittance and reflectance of nanoporous thin-films are computed by solving the Maxwell's equations and the associated boundary conditions at all interfaces using finite element methods. The effective optical properties of the films are retrieved by minimizing the root mean square of the relative errors between the computed and theoretical transmittance and reflectance. Nanoporous thin-films made of SiO2 and TiO2 consisting of cylindrical nanopores and nanowires are investigated for different diameters and various porosities. Similarly, electromagnetic wave transport through dielectric medium with embedded metallic nanowires are simulated. Numerical results are compared with predictions from widely used effective property models including (1) Maxwell-Garnett Theory, (2) Bruggeman effective medium approximation, (3) parallel, (4) series, (5) Lorentz-Lorenz, and (6) VAT models. Very good agreement is found with the VAT model for both the effective index of refraction and absorption index. Finally, the effect of volume fraction on the effective complex index of refraction predicted by the VAT model is discussed. For certain values of wavelengths and volume fractions, the effective index of refraction or absorption index of the composite material can be smaller than that of both the continuous and dispersed phases. These results indicate guidelines for designing nanocomposite optical materials.

Growth and optical properties of Sn–Si nanocomposite thin films

2012 ◽  
Vol 47 (19) ◽  
pp. 6972-6978 ◽  
Author(s):  
Md. Ahamad Mohiddon ◽  
M. Ghanashyam Krishna
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Nanocomposite Thin Films

Investigations on nonlinear optical properties of electron beam treated Gd:ZnO thin films for photonic device applications

Laser Physics ◽  
2017 ◽  
Vol 27 (6) ◽  
pp. 065403 ◽  
Author(s):  
K Spoorthi ◽  
S Pramodini ◽  
I V Kityk ◽  
M Abd-Lefdil ◽  
M Sekkati ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Electron Beam ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photonic Device ◽  
Device Applications
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