Tunable subluminal to superluminal propagation via spatio-temporal solitons by application of Laguerre fields intensities

Arif, Syed Muhammad; Bacha, Bakht Amin; Wahid, Umer; Haneef, Muhammad; Ullah, Arif

doi:10.1016/j.physleta.2020.127041

Cited by 25 publications

(4 citation statements)

References 34 publications

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“…Using the following integral transform equation, we can solve the coupled equation in matrix form [58][59][60]:…”

Section: M Nmentioning

confidence: 99%

“…Ijaz et al [44] studied the optical solitons and achieved solitons pulse propagation through induced cesium doppler broadening medium with the strength of Rabi oscillations and inverse Doppler broadening. Arif and his co-workers [45] investigated bright and dark solitons behavior in time and space domain. They further detected significant tunability from subluminal to superluminal propagation via spatiotemporal solitons by using Laguerre fields intensities.…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of bright optical solitons through a coherent atomic medium

Ahmad¹,

Bacha²,

Ullah³

et al. 2021

Phys. Scr.

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A coherent atomic medium is proposed for manipulating the absorption, dispersion, transmission and reflection of an optical soliton via two strong coherent control field's Rabi oscillations, detunings and incident angles. Significant anomalous dispersion regions and a negative group index are investigated. A group index of n g =−1500 and a negative group velocity of v g =−2.0×10 5 ms −1 is calculated. This leads to superluminal propagation (v g >c) in the anomalous dispersion region. A significant cancellation of linear and nonlinear effects results a bright optical soliton in the coherent atomic medium. Similarly the shape-preserving phenomenon of the bright optical solitons is investigated by launching the input pulse at different incident angles. As a result, the intensity distribution of the optical solitons has no fluctuation in time t/τ 0 with any values of y/ω 0 and shows a significant bright form of solitary waves. These solitons show remarkable applications in optics, particularly in soliton radar technology for medical purposes, controlling the intensity of bright solitons for the modification of optical information processing, high-speed optical switching and quantum communication.

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“…Using the following integral transform equation, we can solve the coupled equation in matrix form [58][59][60]:…”

Section: M Nmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamics of bright optical solitons through a coherent atomic medium

Ahmad¹,

Bacha²,

Ullah³

et al. 2021

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Extreme dispersion can reduce the group velocity of light up to many order of its magnitude in vacuum. Both theoretical and experimental work has been done to control and modify the group velocity of light in atomic media [10][11][12], opto-mechanical systems [13,14], Landauquantized graphene [15] and chiral meta-materials [16].…”

Section: Introductionmentioning

confidence: 99%

Match Zehnder interferometry and Laguerre–Gaussian fields dependent photon drag in atomic medium

et al. 2023

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The absorption, dispersion and transmission are controlled and modified with intensity of the control Laguerre Gaussian fields in four level cesium atomic medium. The normal and anomalous slope of dispersion is investigated for subluminal and superluminal propagation. The maximum measured value of positive/negative group index is ng =±1×107, at which the group velocity is ±30 m/s. The maximum delay time between the two beams at the detector without dragging is 0.414 ns and in the presence of dragging is measured to 0.44 ns. The fractional change in delay time without and in the presence of dragging ΔF is measured to ±2%. The maximum phase shift without dragging is reported to 2.6 micro radian and in the presence of dragging is investigated to ±4 micro radian. The fractional change in phase shift is reported from -200% to 50% and may be used for gravitational waves and other signals identification.

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“…Light matter interaction is well studied in different systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In recent years there has been a rapid expansion of research into nanophotonics based on surface plasmon polaritons (SPPs), which are the collective excitations of conduction electrons, usually in a metal that launches from coherent light-matter interaction and having greater momentum than light of the same frequency [20].…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon polariton at the interface of dielectric and graphene medium using the Doppler broadening effect

Ahmad¹,

Bakhtawar²,

Haneef³

et al. 2022

Laser Phys.

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We theoretically investigate the control of surface plasmon polariton (SPP) generated at the interface of dielectric and graphene due to effective variation of dielectric functions. The input light pulse is controlled and modified in a Doppler broadening dielectric medium. The controlled and modified output, from Doppler broadening dielectric medium is used to excite SPPs at the interface of graphene and dielectric medium. It is noted that at high Doppler width the absorption/dispersion and propagation length of SPPs become saturated and significantly affected by strength of the control fields. The inverse Doppler effect enhances the group speed of SPPs but suddenly decreases at the region of SPPs hole burning. These results have potential applications in optical tweezers, nano-photonics, radiations guiding, plasmonster technology, photovoltaic devices, data storage devices, biosensor technology and solar cells.

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Tunable subluminal to superluminal propagation via spatio-temporal solitons by application of Laguerre fields intensities

Cited by 25 publications

References 34 publications

Dynamics of bright optical solitons through a coherent atomic medium

Dynamics of bright optical solitons through a coherent atomic medium

Match Zehnder interferometry and Laguerre–Gaussian fields dependent photon drag in atomic medium

Surface plasmon polariton at the interface of dielectric and graphene medium using the Doppler broadening effect

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