Comprehensive study of -Alanine passivated colloidal gold nanoparticles and GNP-PVP thin films: Linear optical properties and very large nonlinear refractive index, absorption coefficient, third-order nonlinear susceptibility measurements and effect of passivation

2021 ◽  
Vol 121 ◽  
pp. 111458
Author(s):  
A.L. Sunatkari ◽  
S.S. Talwatkar ◽  
Y.S. Tamgadge ◽  
G.G. Muley
Keyword(s):  
Thin Films ◽  
Gold Nanoparticles ◽  
Refractive Index ◽  
Optical Properties ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Colloidal Gold Nanoparticles ◽  
Linear Optical Properties ◽  
Third Order Nonlinear Susceptibility ◽  
Comprehensive Study

Enhanced and controllable nonlinear effects in composite with aligned gold spheroid arrays

2015 ◽  
Vol 24 (01) ◽  
pp. 1550013 ◽  
Author(s):  
Libing Ye ◽  
Jun Guo ◽  
Leyong Jiang ◽  
Xiaoyu Dai
Keyword(s):  
Optical Properties ◽  
Nonlinear Effects ◽  
Prolate Spheroid ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Depolarization Factor ◽  
Nanoparticle Shape ◽  
Linear Optical Properties ◽  
Dielectric Host ◽  
Third Order Nonlinear Susceptibility

The linear and nonlinear optical properties of composite containing aligned prolate spheroid nanoparticles embedded in a dielectric host are studied as a function of depolarization factor. It is shown that the effective third-order nonlinear susceptibility of the composite can be significantly enhanced with respect to the linear optical properties, due to a combination of varying nanoparticle shape and interparticle space. The susceptibility enhancement is up to four orders larger compared to the spherical case. The susceptibility enhancement of the host is finally comparable to the inclusion after choosing property structure parameters. The geometry-dependent susceptibility enhancement can lead to an improved figure of merit for nonlinear absorption.

Glass Structures and Linea/Nonlinear Optical Properties of Ag2O-Doped TeO2 Glasses

2014 ◽  
Vol 617 ◽  
pp. 141-144 ◽  
Author(s):  
Yusuke Kasuya ◽  
Toshiki Suhara ◽  
Tomokatsu Hayakawa ◽  
Philippe Thomas ◽  
Masayuki Nogami
Keyword(s):  
Optical Properties ◽  
Absorption Edge ◽  
Photoelectron Spectroscopy ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
Nonlinear Properties ◽  
Nonlinear Optical Devices ◽  
Third Order Nonlinear Susceptibility

A family of TeO2-based glasses is known to have high third-order nonlinear properties and expected as nonlinear optical devices. In the present study, we fabricated Ag2O-TeO2 and Ag2O-Nb2O5-TeO2 glasses, and estimated their structures and linear/nonlinear optical properties. The main results showed that the absorption-edge of the glasses was shifted to longer wavelength side with increasing Ag2O content. By Raman spectroscopy, it was found that an increase in Ag2O content promoted to change TeO4 to TeO3/TeO3+1 units. X-ray photoelectron spectroscopy (XPS) revealed the presence of an electronic state of Ag2+ ions, which was supposed to have a large influence on the absorption-edge wavelength. In Ag2O-Nb2O5-TeO2 glass system, the third-order nonlinear susceptibility χ(3) increased with increasing Ag2O content at the expense of Nb2O5 content.

Nonlinear Optical Properties of 0.7(Na1/2Bi1/2)TiO3-0.3(K1/2Bi1/2)TiO3 Thin Films Using Z-Scan Technique

2013 ◽  
Vol 669 ◽  
pp. 340-348 ◽  
Author(s):  
Ting Zhang ◽  
Cai Hong Jia ◽  
Ying Bai ◽  
Wei Feng Zhang
Keyword(s):  
Thin Films ◽  
Nonlinear Optical ◽  
Sol Gel ◽  
Picosecond Laser ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
The Real ◽  
Sol Gel Process ◽  
Quartz Substrates ◽  
Third Order Nonlinear Susceptibility

Well-crystallized 0.7(Na1/2Bi1/2)TiO3-0.3(K1/2Bi1/2)TiO3 (NKBT) thin films were prepared on quartz substrates using a sol-gel process. The sign and magnitude of both the real and imaginary parts of third-order nonlinear susceptibility (3) of the thin films have been determined by the Z-scan technique performed at 532nm with picosecond laser. The nonlinear refractive index n2 and the nonlinear absorption coefficient of the thin films are determined to be 3.13×10-8 esu and 3.84×10-9 m/W, respectively. The real part and imaginary part of the third-order nonlinear susceptibility (3) of the sample were calculated and the values were 1.49×10-16 m2/V2and 3.96×10-18 m2/V2, respectively. The results suggested that the nonlinearity is dominated by the refractive for the films and the NKBT thin films is a promising material for applications in nonlinear optical devices.

Large third-order optical nonlinearity in PdO thin films

2017 ◽  
Vol 26 (03) ◽  
pp. 1750037 ◽  
Author(s):  
M. S. Brodyn ◽  
V. I. Volkov ◽  
V. I. Rudenko ◽  
V. R. Liakhovetskyi ◽  
A. O. Borshch
Keyword(s):  
Thin Films ◽  
Optical Nonlinearity ◽  
Nonlinear Susceptibility ◽  
Wave Mixing ◽  
Third Order ◽  
Pulsed Laser Radiation ◽  
Long Wavelength ◽  
The Third ◽  
Wavelength Absorption ◽  
Third Order Nonlinear Susceptibility

We report on a study of the absorption spectra and third-order nonlinear optical properties of crystalline PdO thin films, grown by oxidation of thin palladium films deposited on a substrate. The spectra reveal an absorption peak at [Formula: see text][Formula: see text]nm, which grows and narrows significantly as the temperature is lowered to [Formula: see text][Formula: see text]K. This behavior suggests an exciton nature of the peak. According to the position of the long wavelength absorption edge in the spectra, the bandgap of the material is [Formula: see text][Formula: see text]eV. Utilizing the techniques of degenerate four-wave mixing and Z-scan, using a pulsed laser radiation with a wavelength [Formula: see text][Formula: see text]nm and a pulse duration of [Formula: see text][Formula: see text]ns, we determined the real part of the third-order nonlinear susceptibility of Re[Formula: see text][Formula: see text]esu. Possible nature of this high refractive nonlinearity is discussed.

Dispersion measurements of the third-order nonlinear susceptibility of polythiophene thin films

1990 ◽  
Vol 175 (1-2) ◽  
pp. 11-16 ◽  
Author(s):  
W.E. Torruellas ◽  
D. Neher ◽  
R. Zanoni ◽  
G.I. Stegeman ◽  
F. Kajzar ◽  
...  
Keyword(s):  
Thin Films ◽  
Nonlinear Susceptibility ◽  
Third Order ◽  
The Third ◽  
Third Order Nonlinear Susceptibility

Synthesis, Characterization, and Optical Properties of Inorganic Polymer Films

1991 ◽  
Vol 244 ◽  
Author(s):  
Gregory J. Exarhos ◽  
William D. Samuels ◽  
Sarah D. Burton
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Optical Properties ◽  
Model Systems ◽  
Third Order ◽  
Non Linear ◽  
Linear Optical Properties ◽  
Linear Optical ◽  
Chemical Groups ◽  
Inorganic Polymer Films

ABSTRACTThe linear and non-linear optical response of phosphazene and siloxane polymers and cyclic precursors is influenced by the nature of chemical groups substituted onto the heteronuclear backbone chains. Polymer mechanical properties, chemical stability, and solubility also are affected. Significant variations in both second and third order susceptibilities have been measured for various substituted phosphazene materials. The electron donating tendency of substitutional groups appears to correlate with the measured non-linear optical properties determined by SHG and DFWM experiments in these systems where d¦-p¦ bonding along the polymer chain is important. Approaches to the synthesis, and deposition of these materials as thin films will be discussed. Variations in optical properties are highlighted for several model systems in terms of substitutional group perturbation to the chemical bonding between the chain heteroatoms.

Investigation of third-order nonlinear optical properties of DMIT derivatives by Z-scan technique

2017 ◽  
Vol 26 (02) ◽  
pp. 1750018 ◽  
Author(s):  
Jing-Wei Chen ◽  
Xin-Qiang Wang ◽  
Quan Ren ◽  
Ting-Bin Li ◽  
Hong-Liang Yang
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Nonlinear Susceptibility ◽  
Saturable Absorption ◽  
Infrared Band ◽  
Third Order ◽  
Focusing Effect

Three 1,3-dithiole-2-thioxo-4,5-dithiolato compounds, ethyltriphenylphosphonium bis(2-thioxo-1.3-dithiole-4,5-dithiolato)aurate(III) (TPEPADT), benzyltriethylamine bis(2-thioxo-1.3-dithiole-4,5-dithiolato)aurate(III) (BTEAADT) and benzyltriethylamine bis(2-thioxo-1.3-dithiole-4,5-dithiolato)nickel(III) (BTEANDT), were synthesized and the BTEAADT-doped PMMA thin film (BD film) and TPEPADT-doped PMMA thin film (TD film) with mass fraction of 1% were prepared by spin-coating method. The third-order nonlinear optical properties of thin films and three compounds in acetonitrile solutions were investigated by using the laser [Formula: see text]-scan technique with 20 ps pulses at 1064 nm. The [Formula: see text]-scan spectra revealed that TPEPADT and BTEAADT exhibited self-defocusing effect and negligible nonlinear absorption, but BTEANDT exhibited self-focusing effect and stronger saturable absorption. The reason for this difference was analyzed. The magnitudes of third-order nonlinear refractive indices and third-order nonlinear susceptibility were [Formula: see text], 10[Formula: see text] esu for the solution samples and [Formula: see text], [Formula: see text] esu for thin films. All these results suggest that these materials are promising candidates for application in the nonlinear optical area at infrared band.

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