scholarly journals Optical pulses in carbon nanotubes with strong electron-electron interaction due to impurities

2021 ◽  
Vol 2057 (1) ◽  
pp. 012103
Author(s):  
N N Konobeeva ◽  
M B Belonenko
Keyword(s):  
Carbon Nanotubes ◽  
Pulse Shape ◽  
Wave Equations ◽  
Pulse Propagation ◽  
Displacement Vector ◽  
Electron Interaction ◽  
Optical Pulses ◽  
Strong Electron ◽  
System Parameters ◽  
Carbon System

Abstract In this paper, we investigate electromagnetic pulse propagation in a medium with impurity carbon nanotubes, which are associated with the acoustic subsystem. The electron spectrum for the carbon system is obtained from the model that takes into account Coulomb impurities. Based on the Maxwell's and the wave equations for the vector of the medium displacements, we obtain the effective equations for the vector potential of the electromagnetic field and the component of the displacement vector of the medium. The dependence of the pulse shape on the various system parameters is analyzed.

scholarly journals Световые пули в периодически неоднородной среде ориентированных углеродных нанотрубок в оптическом резонаторе

2019 ◽  
Vol 126 (4) ◽  
pp. 477
Author(s):  
М.Б. Белоненко ◽  
И.С. Двужилов ◽  
Ю.В. Двужилова ◽  
С.В. Борознин
Keyword(s):  
Carbon Nanotubes ◽  
Inhomogeneous Medium ◽  
Pulse Shape ◽  
Pulse Propagation ◽  
Optical Cavity ◽  
Three Dimensional ◽  
Propagation Rate ◽  
Optical Pulses ◽  
Varying Parameters ◽  
Propagation Dynamics

AbstractThe problem of the propagation dynamics of three-dimensional ultimately short optical pulses in an optical cavity in a periodically inhomogeneous medium of oriented carbon nanotubes is considered. It is shown numerically that such pulses demonstrate stable and sustainable propagation. In addition, it is shown that one can control for the pulse propagation rate and modify the pulse shape by varying parameters of the inhomogeneous medium.

Propagation of ultrashort optical pulses in anisotropic optical media with carbon nanotubes

2021 ◽  
pp. 2150197
Author(s):  
N. N. Konobeeva ◽  
M. B. Belonenko
Keyword(s):  
Carbon Nanotubes ◽  
Electromagnetic Field ◽  
Vector Potential ◽  
Pulse Shape ◽  
Electromagnetic Waves ◽  
Optical Pulses ◽  
Effective Equation ◽  
Ultrashort Optical Pulses ◽  
Optical Media ◽  
Crystal Type

In this paper, we investigate the evolution of electromagnetic waves in a nonlinear anisotropic optical medium with carbon nanotubes (CNTs). Based on Maxwell’s equation, an effective equation is obtained for the vector potential of the electromagnetic field, which takes into account different values of the velocity and polarization with two directions. The dependence of the pulse shape on the crystal type, as well as the angle between the electric field and the CNTs axis is revealed.

scholarly journals Two-dimensional few cycle optical pulses inside a carbon nanotubes photonic crystal

2019 ◽  
Vol 220 ◽  
pp. 03010
Author(s):  
Yulia V. Dvuzhilova ◽  
Ilya S. Dvuzhilov ◽  
Mikhail B. Belonenko
Keyword(s):  
Carbon Nanotubes ◽  
Photonic Crystal ◽  
Pulse Propagation ◽  
Two Dimensional ◽  
Optical Pulses

We have considered the problem of evolution of the two-dimensional few cycle optical pulses (FCOP) inside a photonic crystal made of carbon nanotubes. It has been shown that pulse propagation is stable inside the considered environment and it is possible to control and to change the velocity of the pulse propagation by photonic crystal parameters changing.

Three-dimensional few-cycle optical pulses of Gaussian and super-Gaussian cross-section inside the Bragg medium based on carbon nanotubes with dissipation

2019 ◽  
Vol 33 (23) ◽  
pp. 1950275
Author(s):  
Y. V. Dvuzhilova ◽  
I. S. Dvuzhilov ◽  
A. V. Ten ◽  
E. V. Boroznina ◽  
M. B. Belonenko
Keyword(s):  
Carbon Nanotubes ◽  
Cross Section ◽  
Cross Sections ◽  
Pulse Propagation ◽  
Three Dimensional ◽  
Optical Pulses ◽  
Additional Energy ◽  
Special Aspect ◽  
Dynamic Propagation ◽  
Energy Pumping

We have considered the problem of dynamic propagation of the three-dimensional few-cycle optical pulses of Gaussian and super-Gaussian cross-section inside the Bragg medium with carbon nanotubes. The system has dissipation and additional energy “pumping”. We have shown that the pulse propagation is stable inside the considered environment. The special aspect of the pulse evolution of different cross-sections has been determined.

scholarly journals Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
D. Maryenko ◽  
M. Kawamura ◽  
A. Ernst ◽  
V. K. Dugaev ◽  
E. Ya. Sherman ◽  
...  
Keyword(s):  
Coulomb Interaction ◽  
High Mobility ◽  
Electron System ◽  
Orbit Coupling ◽  
Electron Interaction ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Strong Electron ◽  
Strongly Coupled ◽  
Dimensional Electron System

AbstractSpin–orbit coupling (SOC) is pivotal for various fundamental spin-dependent phenomena in solids and their technological applications. In semiconductors, these phenomena have been so far studied in relatively weak electron–electron interaction regimes, where the single electron picture holds. However, SOC can profoundly compete against Coulomb interaction, which could lead to the emergence of unconventional electronic phases. Since SOC depends on the electric field in the crystal including contributions of itinerant electrons, electron–electron interactions can modify this coupling. Here we demonstrate the emergence of the SOC effect in a high-mobility two-dimensional electron system in a simple band structure MgZnO/ZnO semiconductor. This electron system also features strong electron–electron interaction effects. By changing the carrier density with Mg-content, we tune the SOC strength and achieve its interplay with electron–electron interaction. These systems pave a way to emergent spintronic phenomena in strong electron correlation regimes and to the formation of quasiparticles with the electron spin strongly coupled to the density.

Extremely short optical pulses of airy section in the environment of oriented carbon nanotubes

2020 ◽  
Author(s):  
U. M. Samarov ◽  
T. B. Shilov ◽  
Yu. V. Dvuzhilova ◽  
I. A. Chelnintsev ◽  
I. S. Dvuzhilov
Keyword(s):  
Carbon Nanotubes ◽  
Optical Pulses ◽  
Extremely Short Optical Pulses

On New Aspects of Nested Carbon Nanotubes as Gigahertz Oscillators

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
R. Ansari ◽  
B. Motevalli
Keyword(s):  
Carbon Nanotubes ◽  
Initial Velocity ◽  
Initial Conditions ◽  
Strong Dependence ◽  
Interaction Force ◽  
Arbitrary Length ◽  
Oscillatory Frequency ◽  
Analytical Expression ◽  
System Parameters ◽  
The Core

Nested carbon nanotubes exhibit telescopic oscillatory motion with frequencies in the gigahertz range. In this paper, our previously proposed semi-analytical expression for the interaction force between two concentric carbon nanotubes is used to solve the equation of motion. That expression also enables a new semi-analytical expression for the precise evaluation of oscillation frequency to be introduced. Alternatively, an algebraic frequency formula derived based on the simplifying assumption of constant van der Waals force is also given. Based on the given formulas, a thorough study on different aspects of operating frequencies under various system parameters is conducted, which permits fresh insight into the problem. Some notable improvements over the previously drawn conclusions are made. The strong dependence of oscillatory frequency on system parameters including the extrusion distance and initial velocity of the core as initial conditions for the motion is shown. Interestingly, our results indicate that there is a special initial velocity at which oscillatory frequency is unique for any arbitrary length of the core. A particular relationship between the escape velocity (the minimum initial velocity beyond which the core will leave the outer nanotube) and this specific initial velocity is also revealed.

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