We have investigated electromagnetically induced transparency (EIT) in the spectrum of selective reflection at the interface between Rb atomic vapor and a dielectric nanocell window made of technical sapphire. Two types of spectroscopic cells were used: a nanocell with atomic vapor column thicknesses ranging from 150 to 1200 nm, and a 50μm-thick microcell. We have compared electromagnetically induced transparency resonances in a Λ-type atomic system observed using selective reflection as the probe radiation and/or transmission radiation. It was demonstrated that for thicknesses below 1000 nm, the selective reflection technique is more advantageous. Notably, at a thickness of ∼150nm, electromagnetically induced transparency resonance is clearly observed using selective reflection, while it is nearly absent when using transmission radiation. This enables the realization of ∼150nm spatial resolution in mapping a strongly inhomogeneous magnetic field of 3.3 G/μm.

中文翻译：

---

使用薄 Rb 蒸汽室的选择性反射辐射实现电磁感应透明


我们研究了 Rb 原子蒸气与由技术蓝宝石制成的介电纳米电池窗口之间的界面选择性反射光谱中的电磁感应透明度 （EIT）。使用了两种类型的光谱池：原子蒸气柱厚度范围为 150 至 1200 nm 的纳米池和 50μm 厚的微池。我们比较了使用选择性反射作为探针辐射和/或透射辐射观察到的 Λ 型原子系统中的电磁感应透明共振。结果表明，对于低于 1000 nm 的厚度，选择性反射技术更有利。值得注意的是，在 ∼150nm 的厚度下，使用选择性反射可以清楚地观察到电磁感应的透明共振，而在使用透射辐射时则几乎不存在。这使得在映射 3.3 G/μm 的强不均匀磁场时实现了 ∼150nm 的空间分辨率。