Absorption-free superluminal light propagation in a Landau-quantized graphene

Kazemi, Seyedeh Hamideh; Maleki, Mohammad Ali; Mahmoudi, Mohammad

doi:10.1063/1.5025659

Cited by 12 publications

(5 citation statements)

References 74 publications

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“…Controlling group velocity of light has been another object of quickly growing attention in the last few years. Up to now, numerous experimental and theoretical works have been devoted to control group velocity of light in materials such as atomic medium [35], dielectric medium [36], optomechanical system [37,38], chiral metamaterials [39], and Landau-quantized graphene [40]. Slow light propagation can be treated as a highly promising tool for realizing controllable optical delay lines, optical buffers, spectrometers with enhanced spectral resolution and optical memories.…”

Section: Introductionmentioning

confidence: 99%

Enhanced photon drag in closed-loop quantum systems

Kazemi

Mahmoudi

2019

Phys. Scr.

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In recent years, photon drag has attracted enormous attention owing to both fundamental and practical interests. In this paper, we investigate dragging effect in quantum systems with closed-loop interaction. First, we demonstrate an enhanced photon drag in a moving atomic medium with a three-level Λ-type structure. By incorporating the interference of spontaneous emissions, the properties of the atomic medium can be easily controlled by the relative phase of applied fields so that a large group index along with a transparency or even a gain can be achieved. As the photon drag is proportional to the group index, the enhancement can be also found in the dragging of light. Such enhanced dragging effect can be applied for the efficient modulators of light, position control, and the detection of slow motion. We then investigate the Fresnel’s light drag effect in another closed-loop structure, i.e. chiral molecules with a cyclic three-level Δ-type configuration, and show that left- and right-handed chiral molecules exhibit different dragging effects. This provides a possible way to probe the molecular chirality, which may find applications in the sorting and separation of chiral molecules.

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Section: Introductionmentioning

confidence: 99%

Enhanced photon drag in closed-loop quantum systems

Kazemi

Mahmoudi

2019

Phys. Scr.

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“…Phenomena such as electromagnetically induced transparency [26], optical bistability (OB) [27][28][29][30], enhanced Kerr effect [31], optical solitons [32] and others [10,[33][34][35][36][37][38] were widely studied by different researchers. Phenomena like these in monolayer graphene system were studied by many researchers to realize all-optical systems [39][40][41][42][43]. For example, Asadpour and Rahimpour Soleimani studied phase control of OB and multistability in a ring cavity doped with a four-level graphene nanostructure in infrared regions [44].…”

Section: Introductionmentioning

confidence: 99%

Entanglement control in a laser driven single layer graphene system

Ali,

AbdulKareem,

Hussein

et al. 2023

Laser Phys. Lett.

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In this letter, we have proposed a new model for quantum control of atom photon entanglement in a single layer graphene via von Neumann reduced entropy of entanglement. We consider the effect of terahertz laser field intensity on the degree of entanglement (DEM) in the resonance and off-resonance condition of the applied fields. We also investigate the spatially dependent of the DEM when two applied light becomes standing wave pattern in x and y directions. Our results show that in different parametric conditions, the population of the different states can be controlled and this leads to modifying the DEM of the system.

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“…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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Absorption-free superluminal light propagation in a Landau-quantized graphene

Cited by 12 publications

References 74 publications

Enhanced photon drag in closed-loop quantum systems

Enhanced photon drag in closed-loop quantum systems

Entanglement control in a laser driven single layer graphene system

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

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