Propagation of laser pulse in a three-level cascade inhomogeneously broadened medium under electromagnetically induced transparency conditions

Khoa, Dinh Xuan; Dong, Hoang Minh; Doai, Le Van; Bang, Nguyen Huy

doi:10.1016/j.ijleo.2016.11.106

Cited by 30 publications

(12 citation statements)

References 33 publications

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“…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: 99%

“…It has been shown that a very steep slope of the refractive index profile can slow down group velocity of light [31], even stop and storage of light pulse in the EIT medium [32]. These aspects deliver several potential applications, e.g., lossless propagation of light pulse [33][34][35], all-optical switching [36][37][38], quantum storage devices, logic gates and the generation of photonic qubits [39,40], and so on.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Bang¹,

Van²,

Xuan³

2019

Comm. in Phys.

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“…However, the above studies on negative refractive index in EIT materials have often ignored Doppler broadening and thus they can only be suitable for ultra-cooled atoms confined in a magneto-optical trap (MOT). In order to be able to apply EIT materials in practice operating under different temperature conditions, Doppler effect has been included in some recent studies on EIT [16]-[23], group velocity of light [24]- [27], pulse propagation [28], [29], Kerr nonlinearity [30]- [34] and related phenomena at room temperature should be considered.…”

Section: Introductionmentioning

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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“…The advent of EIT [2][3][4][5][6][7] has created transparent media whose optical properties can be controlled by the external fields. Due to very steep dispersion in transparent spectral region, therefore light pulses can propagate with very small group velocities [8][9][10], the medium can achieve giant Kerr nonlinearities [11][12][13][14], and optical soliton is also easily achieved with low intensity [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

All-Optical Switching In A Medium of A Four-Level Vee-Cascade Atomic Medium

Xuan

Van

Dong

et al. 2021

Preprint

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We proposed a model for all-optical switching in a medium consisting of four-level vee-cascade atomic systems excited by coupling, probe, and signal fields. It is shown that, by changing the intensity or the frequency of the signal field, the medium can be actively switched between either electromagnetically induced transparency (EIT) or electromagnetically induced absorption (EIA), which has behavior of all-optical switching. As a result, a cw probe field is switched into square pulses by modulating the intensity or the frequency of the signal light. Furthermore, width of the square probe pulses can be controlled by tuning the switching period of the signal field. Such a tuneable all-optical switching is useful for finding related applications in optic communications and optical storage devices.

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Propagation of laser pulse in a three-level cascade inhomogeneously broadened medium under electromagnetically induced transparency conditions

Cited by 30 publications

References 33 publications

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

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

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

All-Optical Switching In A Medium of A Four-Level Vee-Cascade Atomic Medium

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