Spontaneous emission from a two-level atom in a dynamic photonic crystal with an isotropic disoersion relation

Rong, Xing; Shuang-Yuan, Xie; Xu, Jing-Ping; Yang, Yuchen

doi:10.7498/aps.63.094205

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…Recently, EIT shows the wide applications in the field of cavity optomechanics, [9] optical lattice for cold atoms, [10] and hybrid atom-molecular system. [11,12] Photonic crystal structure [13][14][15][16] with periodically varying refractive index is capable of controlling the flow of light wave. The main feature is to open photonic band gaps (PBGs) resulting from Bragg scattering.…”

Section: Introductionmentioning

confidence: 99%

Optical control of light propagation in photonic crystal based on electromagnetically induced transparency

Wang

Zhang

2016

Chinese Phys. B

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A kind of photonic crystal structure with modulation of the refractive index is investigated both experimentally and theoretically for exploiting electromagnetically induced transparency (EIT). The combination of EIT with periodically modulated refractive index medium gives rise to high efficiency reflection as well as forbidden transmission in a threelevel atomic system coupled by standing wave. We show an accurate theoretical simulation via transfer-matrix theory, automatically accounting for multilayer reflections, thus fully demonstrate the existence of photonic crystal structure in atomic vapor.

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Section: Introductionmentioning

confidence: 99%

Optical control of light propagation in photonic crystal based on electromagnetically induced transparency

Wang

Zhang

2016

Chinese Phys. B

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“…At present, three-component cropping system should be established instead of two-component cropping system by cropping structure adjustment. Studies had shown that "ryegrass-rice" rotation system not only produce a large number of high-quality forage, but also improve the paddy soil properties [6][7][8][9]. In this project, we interplanted L. perenne under the fruit trees, and determined its nutrient contents.…”

Section: Introductionmentioning

confidence: 99%

Nutritional Value Change during Processing Forage Block from Under-Forest Interplanting Lolium Perenne

Chen

Feng

Zhang

et al. 2014

AMR

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In order to make use of the under-forest economy, Lolium perenne were interplanted under the trees, and the effect of coarse fodder processing on the nutrient content of under-forest interplanting Lolium perenne was analyzed. The result showed that the contents of calcium and phosphorus of under-forest interplanting Lolium perenne were 0.79% and 0.119%, while those of forage blocks processed were 0.82% and 0.115%, and the one starch-added were 0.74% and 0.125%, respectively. The calcium contents were 0.51%, 0.67% and 0.76% when the ratio of Lolium multiflorum/ Illicium verum were 100:1, 200:1 and 300:1 in the processed forage blocks, and the phosphorus contents were 0.121%, 0.123% and 0.127%, respectively. The results suggested that the coarse fodder processing and additive have no obvious influence on the mineral nutrients of Lolium perenne during forage block processing, and the optimal ratio of Lolium perenne/ Illicium verum is 300:1 in the forage.

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Characteristics of the spontaneous emission field and spectrum of a two-level atom in a dynamic photonic crystal

Rong¹,

Shuang-Yuan²,

Xu³

et al. 2016

Acta Phys. Sin.

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The spontaneous emission field and spectrum of a two-level atom, located in an isotropic photonic crystal with dynamic band edges, are investigated by means of numeric calculation. The investigation is expected to help comprehend the characteristics of the atomic spontaneous emission in the dynamic photonic crystal, and provide a possible way to control dynamically the spontaneous emission in photonic crystal. The expression of the spontaneous radiation field is obtained without using the far-zone approximation and the Weisskopf-Wigner approximation, and expected to be applicable in other relevant researches. In the investigation, the spontaneous radiation field and spectrum are calculated when the band edge frequency is unmodulated, or modulated by a step function or triangle function. In the unmodulated situation, the radiation field intensity tends to a constant which is equal to the intensity of the localized field component. The radiation field pulse presents a wave packet behavior as propagation distance increases. The components of the radiation field correspond one-to-one to the peaks in the spontaneous radiation spectrum. When the band edge frequency is modulated by step function, the radiation field intensity tends to a steady-state value after the modulation has happened. And the steady-state intensity is affected by the time when the modulation happens. The components of the non-localized field and the frequency of the localized field after modulation depend on the atomic transition frequency and the band edge frequency, and are identical to those in the unmodulated situation with the same parameters. When the band edge frequency is modulated by a triangle function, the field intensity presents a decaying quasi-periodic oscillation after a long enough time. The modulation frequency determines the frequency of the oscillation, and influences the decay rate. The radiation energy becomes sharp peaks around a set of the discrete frequencies which are evenly spaced with the modulation frequency. The central frequency of these frequencies depends on the atomic transition frequency and the value range of the band edge frequency. The modulation initial phase affects the intensity of the radiation field emitted in an initial period of time.

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Spontaneous emission from a two-level atom in a dynamic photonic crystal with an isotropic disoersion relation

Cited by 4 publications

References 34 publications

Optical control of light propagation in photonic crystal based on electromagnetically induced transparency

Optical control of light propagation in photonic crystal based on electromagnetically induced transparency

Nutritional Value Change during Processing Forage Block from Under-Forest Interplanting Lolium Perenne

Characteristics of the spontaneous emission field and spectrum of a two-level atom in a dynamic photonic crystal

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