Optical response of gas-phase atoms at less than ?/80 from a dielectric surface.
Optical response of gas-phase atoms at less than ?/80 from a dielectric surface.
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气相原子在电介质表面的光学响应小于 ?/80。
DOI：
10.1103/physrevlett.112.253201
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发表时间：
2014
影响因子：
8.6
通讯作者：
Whittaker KA
中科院分区：
文献类型：
--
作者：
Whittaker KA
我们提出了在蓝宝石表面几十纳米（低至11纳米）范围内原子-光相互作用的实验观察。利用光子计数，我们检测了1000个Rb或Cs原子的荧光，这些原子被限制在厚度远小于光激发波长的蒸汽中。光谱线形状的不对称性提供了原子表面电位的直接读出。数值拟合表明幂定律，证实范德华相互作用优于其他效应。我们的光子计数技术的极高灵敏度可能使我们能够寻找原子表面的束缚态。
We present experimental observations of atom-light interactions within tens of nanometers (down to 11 nm) of a sapphire surface. Using photon counting we detect the fluorescence from of order one thousand Rb or Cs atoms, confined in a vapor with thickness much less than the optical excitation wavelength. The asymmetry in the spectral line shape provides a direct readout of the atom-surface potential. A numerical fit indicates a power lawwithconfirming that the van der Waals interaction dominates over other effects. The extreme sensitivity of our photon-counting technique may allow the search for atom-surface bound states.