scholarly journals Nonlinear optical conductivity of a generic two-band system with application to doped and gapped graphene

2017 ◽  
Vol 95 (15) ◽  
Author(s):  
Ashutosh Singh ◽  
Kirill I. Bolotin ◽  
Saikat Ghosh ◽  
Amit Agarwal
Keyword(s):  
Optical Conductivity ◽  
Nonlinear Optical ◽  
Band System ◽  
Gapped Graphene

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.

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.

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