Electromagnetically induced transparency in a five-level cascade system under Doppler broadening: an analytical approach

Khoa, Dinh Xuan; Trong, Pham Van; Doai, Le Van; Bang, Nguyen Huy

doi:10.1088/0031-8949/91/3/035401

Cited by 32 publications

(25 citation statements)

References 29 publications

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“…We can see that the amplitude and the frequency bands of negative refractive index decrease markedly as the temperature of the medium increases. It is because increasing temperature reduces the efficiency of EIT [19].…”

Section: Resultsmentioning

confidence: 99%

Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

Bang

Phu

et al. 2021

IEEE Photonics J.

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In this paper, we present the study on negative refractive index in an inhomogeneously broadened four-level inverted-Y atomic medium based on electromagnetically induced transparency (EIT). The expressions of the relative permittivity and the relative permeability are derived under Doppler broadening. For this four-level system, we have found two frequency bands of negative refractive index in an optical region corresponding to two EIT windows. The influences of coupling and signal laser fields as well as temperature on frequency bands of negative refractive index are investigated. Our research can be convenient for experimental implementation with real atomic media under different temperatures.

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Section: Resultsmentioning

confidence: 99%

Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

Bang

Phu

et al. 2021

IEEE Photonics J.

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“…Although the numerical simulations on the EIT spectrum in [71,72] were helpful to explain experimental observation, there is still a lack of analytical representation of EIT spectrum which is important for various applications. In order to overcome this lack, Bang and co-workers have recently developed an analytical method to represent the EIT spectrum [74][75][76]. Such analytical model supports several interesting works concerning giant Kerr nonlinearity [77], OB [78], generating optical nano-fiber (ONF) for guiding entangled beams [79], slowed multi-frequency light [80,81], and lossless propagation of light pulse [34,35].…”

Section: Introductionmentioning

confidence: 97%

Controllable Optical Properties of Multiple Electromagnetically Induced Transparency in Gaseous Atomic Media

Bang¹,

Van²,

Xuan³

2019

Comm. in Phys.

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The advent of electromagnetically induced transparency (EIT) offered a new coherent material with exotic and controllable optical properties. Although, studies on single-EIT are described in detail for single-EIT, however, extension from single- to multi- EIT is currently of current interest due to it gains advantages in multi-channel optical communication, waveguides for optical signal processing and multi-channel quantum information processing. In this work, we review recent research works concerning multi-EIT and some related applications, as controlling group velocity of light, giant Kerr nonlinearity, optical bistability. A special attention of the review also gives for analytical interpretations of EIT spectrum, its dispersion and related applications such as EIT enhanced Kerr nonlinearity and optical bistability to give physics insight. From experimental point of view, a latest development for measuring multi-EIT spectrum and its dispersion in hot medium is presented and compared to theoretical analytical representations.

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“…The manipulation of subluminal and superluminal light propagation in optical medium has attracted many attentions due to its potential applications during the last decades, such as controllable optical delay lines, optical switching [1], telecommunication [2], interferometry, optical data storage and optical memories quantum information processing, and so on [3]. The most important key to manipulate subluminal and superluminal light propagations lies in its ability to control the absorption and dispersion properties of a medium by a laser field [4,5].…”

Section: Introduction mentioning

confidence: 99%

Determine Dispersion Coefficient of 85Rb Atom in the Y–Configuration

Dũng

2019

MaP

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In this work, we derive analytical expression for the dispersion coefficient of 85Rb atom for a weak probe laser beam induced by a strong coupling laser beams. Our results show possible ways to control dispersion coefficient by frequency detuning and of the coupling lasers. The results show that a Y-configuration appears two transparent window of the dispersion coefficient for the probe laser beam. The depth and width or position of these windows can be altered by changing the intensity or frequency detuning of the coupling laser fields. Keywords: Electromagnetically induced transparency, dispersion coefficient.

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Electromagnetically induced transparency in a five-level cascade system under Doppler broadening: an analytical approach

Cited by 32 publications

References 29 publications

Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

Negative Refractive Index in an Inhomogeneously Broadened Four-Level Inverted-Y Atomic Medium

Controllable Optical Properties of Multiple Electromagnetically Induced Transparency in Gaseous Atomic Media

Determine Dispersion Coefficient of 85Rb Atom in the Y–Configuration

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