铷原子在稀有气体薄膜中的激发和发射光谱
Excitation and emission spectra of rubidium in rare-gas thin-films
摘要：
为了了解固体基质中原子的光学性质，详细研究了掺铷的氩、氪和氙薄膜的吸收、激发和发射光谱。二维光谱分析扩展了以前关于稀有气体基质中铷的激发和发射性质的报道。我们发现，氪和氙的掺杂晶体表现出简单的吸收-发射关系，而铷在氩中表现出更复杂的光谱结构。我们的样品制备在本工作中使用的Ar晶体产生不同的结果，但我们的峰位置是一致的预测的基础上的线性外推的Kr和Kr数据。我们还观察到铷原子激发光谱中的漂白行为，这表明由于空穴燃烧，从一个光谱特征到另一个光谱特征的布居转移。所观察到的光学响应意味着，在稀有气体薄膜中的铷在低浓度样品中可以以极高的灵敏度检测到，可能低至单个原子水平。
英文摘要：
To understand the optical properties of atoms in solid state matrices, the absorption, excitation and emission spectra of rubidium doped thin-films of argon, krypton and xenon were investigated in detail. A two-dimensional spectral analysis extends earlier reports on the excitation and emission properties of rubidium in rare-gas hosts. We found that the doped crystals of krypton and xenon exhibit a simple absorption-emission relation, whereas rubidium in argon showed more complicated spectral structures. Our sample preparation employed in the present work yielded different results for the Ar crystal, but our peak positions were consistent with the prediction based on the linear extrapolation of Xe and Kr data. We also observed a bleaching behavior in rubidium excitation spectra, which suggests a population transfer from one to another spectral feature due to hole-burning. The observed optical response implies that rubidium in rare-gas thin-films is detectable with extremely high sensitivity, possibly down to a single atom level, in low concentration samples.
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