Extremely short optical pulses and superstrings

We analyze the propagation of an extremely short optical pulse from the numerical solution of the Maxwell’s equation related to the effective action obtained in the framework of the theory of superstrings in flat time space. The pulse dynamics turned out to be unstable and eventually leads to a collapse. We particularly analyze the Schwinger mechanism which occurs during the collapse of the pulse.

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Предельно короткие оптические импульсы в фотонном кристалле из углеродных нанотрубок под действием внешнего поля накачки

Оптика и спектроскопия ◽

10.21883/os.2021.01.50445.14-20 ◽

2021 ◽

Vol 129 (1) ◽

pp. 92

Author(s):

И.С. Двужилов ◽

Ю.В. Двужилова ◽

М.Б. Белоненко

Keyword(s):

Carbon Nanotubes ◽

Photonic Crystal ◽

Optical Pulse ◽

Modulation Depth ◽

Optical Pulses ◽

Electromagnetic Pulses ◽

Dissipative Forces ◽

The Stability ◽

Semiconductor Carbon Nanotubes ◽

Extremely Short Optical Pulses

In this work, we considered the evolution of extremely short optical pulses in a photonic crystal of semiconductor carbon nanotubes placed in an external pumping field. The possibility of stable propagation of electromagnetic pulses under conditions of a pumping and damping field, due to the balance of dissipative forces and an external field, is shown. The stability of the shape of an extremely short optical pulse at long times is demonstrated with a change in various parameters of the medium, such as the period of inhomogeneity of carbon nanotubes in a photonic crystal and the modulation depth of the refractive index.

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3D few cycle optical pulses in carbon nanotube-based photonic crystal with allowance for mechanical stress

Modern Physics Letters B ◽

10.1142/s0217984921504352 ◽

2021 ◽

pp. 2150435

Author(s):

Yu. V. Dvuzhilova ◽

I. S. Dvuzhilov ◽

M. B. Belonenko ◽

E. N. Galkina

Keyword(s):

Refractive Index ◽

Carbon Nanotube ◽

Gauge Theory ◽

Photonic Crystal ◽

Theoretical Model ◽

Mechanical Stress ◽

Optical Pulse ◽

Three Dimensional ◽

Optical Pulses ◽

Pulse Dynamics

This paper constructs and numerically analyzes a theoretical model of three-dimensional few cycle optical pulse dynamics in semiconductor carbon nanotube-based spatially-modulated refractive index medium. It takes into account external deformation in terms of the gauge theory. It identifies the stable propagation of that kind of pulses in photonic crystal. The paper also reveals the dependence of pulse dynamics on photonic crystal characteristics (refractive index depth and modulation period in particular).

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Three-dimensional diffraction-free Airy pulses in the medium of carbon nanotubes under the conditions of an optical resonator

Izvestiya vysshikh uchebnykh zavedenii. Fizika ◽

10.17223/00213411/64/5/110 ◽

2021 ◽

pp. 110-115

Author(s):

A.M. Belonenko ◽

◽

Yu.V. Dvuzhilova ◽

I.S. Dvuzhilov ◽

M.B. Belonenko ◽

...

Keyword(s):

Carbon Nanotubes ◽

Cross Section ◽

Short Pulse ◽

Three Dimensional ◽

Pulse Velocity ◽

Optical Resonator ◽

Optical Pulses ◽

Pulse Dynamics ◽

Semiconductor Carbon Nanotubes ◽

Extremely Short Optical Pulses

Theoretically investigated the propagation of three-dimensional extremely short optical pulses, the longitudinal Airy cross section in a medium of semiconductor carbon nanotubes under the conditions of an optical resonator. Using numerical simulations, it was found that carbon nanotubes placed in an optical resonator create an environment in which the pulse propagates stably and conserves its energy, and also makes it possible to control some properties of an extremely short pulse (velocity and shape). The calculations of the pulse dynamics were carried out at long times, on the order of 100 ps.

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Interaction of Two-Dimensional Extremely Short Optical Pulses in a Zig-Zag Carbon Nanotubes in the Presence of a High-Frequency Electric Field

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.10(6).06043 ◽

2018 ◽

Vol 10 (6) ◽

pp. 06043-1-06043-4

Author(s):

N. N. Konobeeva ◽

◽

D. S. Skvortsov ◽

M. B. Belonenko ◽

◽

...

Keyword(s):

Carbon Nanotubes ◽

Electric Field ◽

High Frequency ◽

Two Dimensional ◽

Optical Pulses ◽

High Frequency Electric Field ◽

Frequency Electric Field ◽

Extremely Short Optical Pulses

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Ultrashort pulses propagation through different approaches of the Split-Step Fourier method

Journal of Mechatronics Engineering ◽

10.21439/jme.v1i3.20 ◽

2018 ◽

Vol 1 (3) ◽

pp. 2

Author(s):

José Stênio De Negreiros Júnior ◽

Daniel Do Nascimento e Sá Cavalcante ◽

Jermana Lopes de Moraes ◽

Lucas Rodrigues Marcelino ◽

Francisco Tadeu De Carvalho Belchior Magalhães ◽

...

Keyword(s):

Energy Conservation ◽

Optical Pulse ◽

Time Window ◽

Fourier Method ◽

Ultrashort Pulses ◽

Nonlinear Effects ◽

Single Mode ◽

Time Algorithm ◽

Optical Pulses ◽

Running Time

Simulating the propagation of optical pulses in a single mode optical fiber is of fundamental importance for studying the several effects that may occur within such medium when it is under some linear and nonlinear effects. In this work, we simulate it by implementing the nonlinear Schrödinger equation using the Split-Step Fourier method in some of its approaches. Then, we compare their running time, algorithm complexity and accuracy regarding energy conservation of the optical pulse. We note that the method is simple to implement and presents good results of energy conservation, besides low temporal cost. We observe a greater precision for the symmetrized approach, although its running time can be up to 126% higher than the other approaches, depending on the parameters set. We conclude that the time window must be adjusted for each length of propagation in the fiber, so that the error regarding energy conservation during propagation can be reduced.

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