Time-frequency dynamics of superluminal pulse transition to the subluminal regime

Dorrah, Ahmed H.; Ramakrishnan, Abhinav; Mojahedi, Mo

doi:10.1103/physreve.91.033206

Cited by 6 publications

(4 citation statements)

References 24 publications

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“…For example, see Refs. [21][22][23]. On the other hand, to obtain negative permeability values, split ring resonators (SRR) and the induced current on wire structures are used, as can be seen in Refs.…”

Section: Wave Propagation Concepts For Near-future Telecommunication mentioning

confidence: 99%

Photon Propagation Through Dispersive Media

Robles¹,

Pizarro²

2017

Wave Propagation Concepts for Near-Future Telecommunication Systems

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In the present chapter, we study the propagation of photons through dispersive media, starting from a description of the dynamics of free photons using a Dirac-like equation with an analysis of the energy solutions arising from this equation. A comparison with the case of a free electron is made. We present an analysis of the interaction between photons with the medium considering both a classical and a quantum treatment of light, and also we analyse the propagation of photons along a waveguide where they behave as if they did have a finite mass. As a technological application of the theoretical frame here presented, we consider the use of the properties of metamaterials to control the propagation of waves through waveguides filled with this kind of materials.

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Section: Wave Propagation Concepts For Near-future Telecommunication mentioning

confidence: 99%

Photon Propagation Through Dispersive Media

Robles¹,

Pizarro²

2017

Wave Propagation Concepts for Near-Future Telecommunication Systems

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“…In recent decades, several impressive experiments have been performed in the framework of quantum optics, claiming that electromagnetic waves may be propagated faster than light [1][2][3][4][5][6][7][8][9]. Superluminal behaviour is particularly manifested when such experiments are carried out using dispersive media, waveguides, and devices based on the tunnelling effect.…”

Section: Introductionmentioning

confidence: 99%

On photonic tunnelling and the possibility of superluminal transport of electromagnetic energy

Nanni

2023

Pramana - J Phys

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Motivated by increased interest in experiments in which light appears topropagate by tunnelling at superluminal velocity, the Lorentz invariant theory proposed by Partha Ghose to explain these surprising effects is revisited. This theory is based on the Harish-Chandra formalism, which describes the relativistic dynamics of a massless spin-1 boson, like a photon. Via this formalism, the Bohmian average transport velocity of the electromagnetic energy is formulated. It is proved that, if the dielectric making the waveguide is nonabsorptive and nondispersive, this velocity can be superluminal. This result is validated in the framework of quantum electrodynamics, demonstrating that the average velocity of the photon inside the waveguide is given by the contribution of instantaneous superluminal velocities. This theory, therefore, suggests the optimal conditions for designing optical devices capable of locally transporting electromagnetic energy at superluminal velocities mitigating the signal attenuation.

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“…These phenomena, referred to as abnormal group velocities (AGVs), are in full compliance with Einstein's causality. The fundamental rules governing AGVs are well established and can be attributed to spectral reshaping [11][12][13][14][15][16][17][18] and energy exchange between the propagating pulse and the medium [19,20].…”

Section: Introductionmentioning

confidence: 99%

Nonanalytic pulse discontinuities as carriers of information

Dorrah

Mojahedi

2016

Phys. Rev. A

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In this paper, we consider optical pulses encoded with two nonanalytic points, and we evaluate the detectable information of these pulses in media supporting slow-and fast-light propagation. It is shown that, in some configurations of slow-(subluminal) light propagation, the signal is not readily detectable, albeit the arrival of the encoded nonanalytic points at the receiver. It is thus argued that, from a practical point of view, information should not be entirely associated with the pulse discontinuities. On the other hand, it is confirmed that for propagation in vacuum or a fast-light medium, detectable information is bounded by the nonanalytic points, which create a space-time window within which detectable information cannot escape. As such, the distinction between the nonanalytic points of a signal, its energy transport, and detectable information is demonstrated.

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Time-frequency dynamics of superluminal pulse transition to the subluminal regime

Cited by 6 publications

References 24 publications

Photon Propagation Through Dispersive Media

Photon Propagation Through Dispersive Media

On photonic tunnelling and the possibility of superluminal transport of electromagnetic energy

Nonanalytic pulse discontinuities as carriers of information

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