Generalization of the Nonlinear Optical Conductivity Formalism by Using a Projection-reduction Method

2011 ◽  
Vol 58 (3) ◽  
pp. 538-544 ◽  
Author(s):  
Nam Lyong Kang ◽  
Youn Ju Lee ◽  
Sang Don Choi
Keyword(s):  
Optical Conductivity ◽  
Nonlinear Optical ◽  
Reduction Method

scholarly journals Influence of Fe2O3 Dopant on Dielectric, Optical Conductivity and Nonlinear Optical Properties of Doped ZnO-Polystyrene Composites Films

2021 ◽  
Vol 12 (1) ◽  
pp. 170-179
Keyword(s):  
Optical Properties ◽  
Optical Conductivity ◽  
Electron Mobility ◽  
Relative Permittivity ◽  
Nonlinear Optical ◽  
The Other ◽  
Filler Concentration ◽  
Casting Method ◽  
Polystyrene Nanoparticles ◽  
Doped Zno

ZnO-Polystyrene nanoparticles doped with Fe2O3 were prepared by the casting method. Both Ed and Eo were calculated. εL and N/m* increase with filler concentrations for these samples. On the other hand, both M-1, M-3, decreased with increasing filler. The filler concentrations affected on determined values of both of ε\ and ε\\. These values increase with filler, and also the same result was achieved for both σ1 and σ2, which also increases with filler. The relation between VELF and SELF was determined. χ(1) increases with increasing filler ratio. n2, χ(3), βc, were determined theoretically. The electrical susceptibility χe and relative permittivity εr increase with the increase of filler concentration as a result of increasing electron mobility.

scholarly journals Interaction of Pulses of Different Duration with Chemically Prepared Silver Nanoparticles: Analysis of Optical Nonlinearities

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Ke Zhang ◽  
Rashid A. Ganeev ◽  
Konda Srinivasa Rao ◽  
Sandeep Kumar Maurya ◽  
Ganjaboy S. Boltaev ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Nonlinear Refraction ◽  
Optical Nonlinearities ◽  
Chemical Reduction Method ◽  
Ag Nps ◽  
Picosecond Pulses

The nonlinear optical properties of the aqueous solutions of silver nanoparticles (Ag NPs) prepared by chemical reduction method are analyzed using femtosecond and picosecond pulses at different wavelengths. In the case of 800 and 400 nm, the growths of nonlinear absorption and nonlinear refraction with the increase of Ag NP concentration, as well as a change at the signs of nonlinear optical processes, are determined. The nonlinear absorption coefficient and nonlinear refractive index of Ag NP solutions measured using picosecond pulses were a few orders of magnitude larger than those in the case of femtosecond probe pulses. We also demonstrate the optical limiting properties of Ag NPs using 800 nm, 60 fs pulses.

scholarly journals Surfactant-dependant thermally induced nonlinear optical properties of l-ascorbic acid-stabilized colloidal GNPs and GNP–PVP thin films

RSC Advances ◽  
2019 ◽  
Vol 9 (27) ◽  
pp. 15502-15512 ◽  
Author(s):  
A. L. Sunatkari ◽  
S. S. Talwatkar ◽  
Y. S. Tamgadge ◽  
G. G. Muley
Keyword(s):  
Thin Films ◽  
Ascorbic Acid ◽  
Nonlinear Optical ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Chemical Reduction Method ◽  
Thermally Induced ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Gold nanoparticle (GNP) colloids stabilized with various concentrations of l-ascorbic acid were synthesized by the chemical reduction method and characterized by UV-Vis spectroscopy, XRD, FT-IR spectroscopy and TEM.

NONLINEAR ABSORPTION LINE-WIDTHS IN RECTANGULAR QUANTUM WIRES

2011 ◽  
Vol 25 (12n13) ◽  
pp. 1003-1011 ◽  
Author(s):  
TRAN CONG PHONG ◽  
HUYNH VINH PHUC
Keyword(s):  
Optical Conductivity ◽  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Quantum Wires ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Line Widths ◽  
Analytical Expressions ◽  
Rectangular Quantum Wires

Applying the theory of nonlinear optical conductivity for an electron—phonon system, we propose a new method to obtain the line-widths of nonlinear optical conductivity in rectangular quantum wires (RQW). General analytical expressions of the nonlinear absorption power (NLAP) are obtained in the presence of an intense external field. A two-photon absorption process is taken into the result. The dependence of NLAP on the photon energy and the wire's size are numerically calculated and graphically plotted for a specific RQW. From graphs of the NLAP, we obtain line-widths as profiles of curves. The dependence of the line-widths on the temperature and parameters of a RQW are reasonable in comparison with some available theoretical and experimental results.

Sign in / Sign up

Export Citation Format

Share Document