Energy-Pooling Collisions in Rubidium: 5
 P
 3/2
 +5
 P
 3/2
 →5
 S
 +(
 nl
 = 5
 D
 ,7
 S
 )

Shen, Yifan; Dai, Kang; Mu, Baoxia; Wang, Shuying; Cui, Xiangyang

doi:10.1088/0256-307x/22/11/022

Cited by 13 publications

(1 citation statement)

References 8 publications

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“…One well-known phenomenon in alkali-metal vapors is energy pooling, which arises when two optically-excited atoms collide inelastically, resulting in energy transfer to states with higher energy. Energy-pooling collisions have been studied extensively in sodium [27,28], potassium, [29,30], rubidium [31][32][33][34][35][36][37][38] and cesium [39][40][41][42][43][44][45] and play an important role in frequency conversion schemes [10].…”

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confidence: 99%

Cooperative Enhancement of Energy Transfer in a High-Density Thermal Vapor

Weller,

Bettles,

Vaillant

et al. 2013

Preprint

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We present an experimental study of energy transfer in a thermal vapor of atomic rubidium. We measure the fluorescence spectrum in the visible and near infra-red as a function of atomic density using confocal microscopy. At low density we observe energy transfer consistent with the well-known energy pooling process. In contrast, above a critical density we observe a dramatic enhancement of the fluorescence from high-lying states that is not to be expected from kinetic theory. We show that the density threshold for excitation on the D1 and D2 resonance line corresponds to the value at which the dipole-dipole interactions begins to dominate, thereby indicate the key role of these interactions in the enhanced emission.

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