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arXiv 1102.3824physics.atom-ph
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纳米薄铷蒸气室中高对比度D $_{1}$线电磁感应透明

High contrast D$_{1}$ line electromagnetically induced transparency in nanometric-thin rubidium vapor cell

Armen Sargsyan, Claude Leroy, Yevgenya Pashayan-Leroy, Rafayel Mirzoyan, Aram Papoyan, David Sarkisyan

摘要:

利用原子气柱长度为L= 400 ~ 800 nm的纳米薄池研究了铷原子D $_{1}$线的电磁感应透明。它示出,由4个数量级的细胞厚度的减少相比,一个普通的厘米大小的细胞仍然允许形成EIT共振$L= λ$($λ=794$ nm)与高达40%的对比度。纳米薄和普通细胞中EIT形成的显着区别被证明。尽管$L=$ $λ/2$具有强光谱窄化和吸收增加的Dicke效应,但在相对低的耦合激光强度下,在吸收和荧光光谱中都观察到EIT共振。$L=$ $λ$在中等磁场中的EIT共振的良好分辨分裂可用于具有纳米空间分辨率的磁力测量。所提出的理论模型很好地描述了观测结果。

英文摘要:

Electromagnetically induced transparency (EIT) on atomic D$_{1}$ line of rubidium is studied using a nanometric-thin cell with atomic vapor column length in the range of L= 400 - 800 nm. It is shown that the reduction of the cell thickness by 4 orders as compared with an ordinary cm-size cell still allows to form an EIT resonance for $L= λ$ ($λ=794$ nm) with the contrast of up to 40%. Remarkable distinctions of EIT formation in nanometric-thin and ordinary cells are demonstrated. Despite the Dicke effect of strong spectral narrowing and increase of the absorption for $L=$ $λ/2$, EIT resonance is observed both in the absorption and the fluorescence spectra for relatively low intensity of the coupling laser. Well resolved splitting of the EIT resonance in moderate magnetic field for $L=$ $λ$ can be used for magnetometry with nanometric spatial resolution. The presented theoretical model well describes the observed results.

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