Dynamically induced two-color nonreciprocity in a tripod system of a moving atomic lattice

Yang, Liu; Zhang, Yan; Yan, Xiao-Bo; Sheng, Ying; Cui, Cui-Li; Wu, Jin-Hui

doi:10.1103/physreva.92.053859

Cited by 23 publications

(11 citation statements)

References 40 publications

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“…However, response of magnetic materials often performs weak, implying bulky, costly and difficulty or establishing an angular momentum biasing [12][13][14]. Nonmagnetic optical nonreciprocity can also be achieved by optoacoustic effects [11,15], optical nonlinearity [16][17][18][19], and moving systems [20][21][22]. Great research interest were paid on the parity-time symmetry [23,24] recently.…”

Section: Introductionmentioning

confidence: 99%

Coherent Control of Optical Nonreciprocal Propagation in a V-Type Atomic System

Qi¹,

Wang²,

Yue-Ping³

et al. 2020

Int J Opt Photonic Eng

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Optical nonreciprocity and nonreciprocal propagation of light have attracted great research interest, due to not only their fundamental scientific significance, but also their extensive applications in lasing, quantum optical devices and quantum information. In this work, we theoretically and experimentally investigate nonreciprocal propagation of light in a V-type three-level thermal atomic system. By virtue of the EIT effect and the atom thermal motion, nonreciprocal propagation of light is achieved in the Rb87 warm atoms, where high transmission of the probe field is achieved in the co-propagation direction of the control field and the probe field is blocked in the opposite direction of the control field. Transmission and bandwidth for the nonreciprocal propagation of light can be enhanced and controlled by the control field in this system, where the nonreciprocal band width can be broadened significantly in comparison with the Λ-type atomic system. In our experiments, we achieve ~60 MHz nonreciprocal bandwidth for the probe field. This work may have potential applications in quantum nonreciprocal devices such as optical isolator and circulator. on integration of devices.Great efforts dedicate to searching for alternative approaches and mechanisms to break reciprocity without the use of magnetism, especially those for suitable on-chip integration. A photonic band gap material with the combination of linear and nonlinear medium response previously proposed to support unidirectional propagation and optical diode [7]. Spatiotemporal modulation of refractive index of materials is one promising approach for this purpose, which generates optical nonreciprocity via introducing nonreciprocal phase transfer [8,9] and frequency conversion [10,11],

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Section: Introductionmentioning

confidence: 99%

Coherent Control of Optical Nonreciprocal Propagation in a V-Type Atomic System

Qi¹,

Wang²,

Yue-Ping³

et al. 2020

Int J Opt Photonic Eng

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“…Manipulation of multiple optical signals may have potential applications in optical communications and quantum information processing. Utilizing dynamically induced photonic band gaps, Yang et al have proposed a scheme to generate two-color optical nonreciprocity in a cold tripod-type atomic system [56] . In this work, stimulated by these works, we investigated all-optical controlled nonreciprocal propagation of multi-band optical signals in a Ytype-like multi-level hot atomic system.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal transmission of multi-band optical signals in thermal atomic systems

Fan

Niu

et al. 2022

中国光学快报

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Multi-band signal propagation and processing play an important role in quantum communications and quantum computing. In recent years, optical nonreciprocal devices such as an optical isolator and circulator are proposed via various configurations of atoms, metamaterials, nonlinear waveguides, etc. In this work, we investigate all-optical controlled nonreciprocity of multi-band optical signals in thermal atomic systems. Via introducing multiple strong coupling fields, nonreciprocal propagation of the probe field can happen at some separated frequency bands, which results from combination of the electromagnetically induced transparency (EIT) effect and atomic thermal motion. In the proposed configuration, the frequency shift resulting from atomic thermal motion takes converse effect on the probe field in the two opposite directions. In this way, the probe field can propagate almost transparently within some frequency bands of EIT windows in the opposite direction of the coupling fields. However, it is well blocked within the considered frequency region in the same direction of the coupling fields because of destruction of the EIT. Such selectable optical nonreciprocity and isolation for discrete signals may be greatly useful in controlling signal transmission and realizing selective optical isolation functions.

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“…The reflection control of light signals is usually reciprocal and static (i.e., determined by growth design) as achieved, e.g., via fixed band gaps of photonic crystals possessing certain periodic structures of the real refractive index [9,10]. A tunable photonic band gap has been proved to be viable by establishing controlled periodic structures of the complex susceptibility in the regime of electromagnetically induced transparency (EIT) [11,12], with standing-wave coupling fields to dress homogeneous atomic clouds [13][14][15][16][17] or travelingwave coupling fields to dress periodic atomic lattices [18][19][20][21][22][23][24][25][26][27][28][29]. Generally speaking, it is hard to achieve asymmetric light transport in the familiar linear optical processes [30][31][32], though significant progress has been made in the recent years by considering moving atomic lattices [1,2,28] and fabricating materials of parity-time (PT) symmetry or asymmetry [3,4,33,34].…”

Section: Introductionmentioning

confidence: 99%

“…A tunable photonic band gap has been proved to be viable by establishing controlled periodic structures of the complex susceptibility in the regime of electromagnetically induced transparency (EIT) [11,12], with standing-wave coupling fields to dress homogeneous atomic clouds [13][14][15][16][17] or travelingwave coupling fields to dress periodic atomic lattices [18][19][20][21][22][23][24][25][26][27][28][29]. Generally speaking, it is hard to achieve asymmetric light transport in the familiar linear optical processes [30][31][32], though significant progress has been made in the recent years by considering moving atomic lattices [1,2,28] and fabricating materials of parity-time (PT) symmetry or asymmetry [3,4,33,34]. Experimental implementations of these schemes, however, are rather challenging due to the needs of complicated atom-light coupling configurations, precise spatial field arrangement, and balanced gain and loss in a single period.…”

Section: Introductionmentioning

confidence: 99%

Spatial Kramers-Kronig relation and controlled unidirectional reflection in cold atoms

Zhang,

Wu,

Artoni

et al. 2020

Preprint

Self Cite

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We propose a model for realizing frequency-dependent spatial variations of the probe susceptibility in a cold atomic sample. It is found that the usual Kramers-Kronig (KK) relation between real and imaginary parts of the probe susceptibility in the frequency domain can be mapped into the space domain as a far detuned control field of intensity linearly varied in space is used. This non-Hermitian medium exhibits then a unidirectional reflectionless frequency band for probe photons incident from either the left or the right sample end. It is of special interest that we can tune the frequency band as well as choose the direction corresponding to the vanishing reflectivity by changing, respectively, the control field intensity and frequency. The nonzero reflectivity from the other direction is typically small for realistic atomic densities, but can be largely enhanced by incorporating the Bragg scattering into the spatial KK relation so as to achieve a high reflectivity contrast.

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Dynamically induced two-color nonreciprocity in a tripod system of a moving atomic lattice

Cited by 23 publications

References 40 publications

Coherent Control of Optical Nonreciprocal Propagation in a V-Type Atomic System

Coherent Control of Optical Nonreciprocal Propagation in a V-Type Atomic System

Nonreciprocal transmission of multi-band optical signals in thermal atomic systems

Spatial Kramers-Kronig relation and controlled unidirectional reflection in cold atoms

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