Electromagnetically induced blazed grating at low light levels

Carvalho, Silvânia A.; Araujo, Luı́s E. E. de

doi:10.1103/physreva.83.053825

Cited by 33 publications

(16 citation statements)

References 17 publications

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“…and η = 2ρµ 2 gm / ǫ 0 Ω p [20]. Here, the real part ησ R gm of susceptibility stands for the response of dispersion of the medium and the imaginary part ησ I gm for the medium absorption response.…”

Section: C6mentioning

confidence: 99%

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Unidirectional and controllable higher-order diffraction by a Rydberg electromagnetically induced grating

Zhao

et al. 2019

Phys. Rev. A

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A method for diffracting the weak probe beam into unidirectional and higher-order directions is proposed via a novel Rydberg electromagnetically induced grating, providing a new way for the implementations of quantum devices with cold Rydberg atoms. The proposed scheme utilizes a suitable and position-dependent adjustment to the two-photon detuning besides the modulation of the standing-wave coupling field, bringing a in-phase modulation which can change the parity of the dispersion. We observe that when the modulation amplitude is appropriate, a perfect unidirectional diffraction grating can be realized. In addition, due to the mutual effect between the van der Waals (vdWs) interaction and the atom-field interaction length that deeply improves the dispersion of the medium, the probe energy can be counter-intuitively transferred into higher-order diffractions as increasing the vdWs interaction, leading to the realization of a controllable higher-order diffraction grating via strong blockade.

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Section: C6mentioning

confidence: 99%

“…A normal atomic EIG, first proposed by Ling [15] and observed by Mitsunaga in sodium atoms [16], has been widely explored e.g. [17][18][19][20][21]. Other schemes created diffraction gratings based on the modulation of Raman gain without EIT tools [22,23].…”

Section: Introductionmentioning

confidence: 99%

Unidirectional and controllable higher-order diffraction by a Rydberg electromagnetically induced grating

Zhao

et al. 2019

Phys. Rev. A

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“…Пионерские теоретические [1] и экспериментальные [2] исследования эффекта электромагнитно индуцированных решеток (ЭМИР) вызывают существенный интерес, обусловленный потенциальными возможностями использования такого эффекта в оптических устройствах быстрого переключения света [3,4], хранения света [5,6] в настраиваемых фотонных ячейках [7], а также других приложений [8][9][10][11][12][13]. При этом для получения эффекта могут использоваться различные методы, такие как микроволновая модуляция одного из переходов атомной системы [14], использование гигантской керровской нелинейности [15][16][17], усиление спонтанно генерируемой когерентности [18], получение максимальной атомной когерентности [19], контроль спонтанного излучения атомов [20].…”

Section: Introductionunclassified

Высокоэффективная Схема Перераспределения Оптического Излучения На Пространственных Решетках Атомных Населенностей

Гордеев¹,

Рождественский²

2019

Журнал Технической Физики

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The radiation intensity redistribution of the probe field upon its scattering by spatially periodic atomic population gratings in a medium with a four-level tripod configuration of atomic states is investigated theoretically. Conditions are found under which a significant redistribution of the probe-wave field intensity occurs, and a “diffraction” pattern is formed with an efficient probe-field intensity transfer to the first-order maxima.

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“…In this case the traveling-wave (TW) probe field can be diffracted into higher order directions, due to the spatial periodic modulation for the absorption and dispersion of the medium, implemented by the SW field. EIG was first proposed by Ling et al 3 , observed by Mitsunaga and Imoto in sodium atoms 4 , and later widely investigated in different systems [5][6][7] , including Rydberg atoms 8,9 . EIG has also been extended to two-dimensions in multi-level atomic systems 10 , involving non-linear modulation 11 , as well as Raman processes 12 .…”

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confidence: 99%

Azimuthal modulation of electromagnetically induced grating using structured light

Asadpour

Kirova

Qian

et al. 2021

Sci Rep

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We propose a theoretical scheme for creating a two-dimensional Electromagnetically Induced Grating in a three-level $$\Lambda $$ Λ -type atomic system interacting with a weak probe field and two simultaneous position-dependent coupling fields—a two dimensional standing wave and an optical vortex beam. Upon derivation of the Maxwell wave equation, describing the dynamic response of the probe light in the atomic medium, we perform numerical calculations of the amplitude, phase modulations and Fraunhofer diffraction pattern of the probe field under different system parameters. We show that due to the azimuthal modulation of the Laguerre–Gaussian field, a two-dimensional asymmetric grating is observed, giving an increase of the zeroth and high orders of diffraction, thus transferring the probe energy to the high orders of direction. The asymmetry is especially seen in the case of combining a resonant probe with an off-resonant standing wave coupling and optical vortex fields. Unlike in previously reported asymmetric diffraction gratings for PT symmetric structures, the parity time symmetric structure is not necessary for the asymmetric diffraction grating presented here. The asymmetry is due to the constructive and destructive interference between the amplitude and phase modulations of the grating system, resulting in complete blocking of the diffracted photons at negative or positive angles, due to the coupling of the vortex beam. A detailed analysis of the probe field energy transfer to different orders of diffraction in the case of off-resonant standing wave coupling field proves the possibility of direct control over the performance of the grating.

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Electromagnetically induced blazed grating at low light levels

Cited by 33 publications

References 17 publications

Unidirectional and controllable higher-order diffraction by a Rydberg electromagnetically induced grating

Unidirectional and controllable higher-order diffraction by a Rydberg electromagnetically induced grating

Высокоэффективная Схема Перераспределения Оптического Излучения На Пространственных Решетках Атомных Населенностей

Azimuthal modulation of electromagnetically induced grating using structured light

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