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

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

2011-02-18

arxiv.org/abs/1102.3824v1

Physics

Atomic Physics

Submitted to Applied Physics B: Lasers and Optics, 9 pages, 10 figures

Scientific paper

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 $L= \lambda$ ($\lambda =794$ 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 $L=$ $\lambda /2$, 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 $L=$ $\lambda $ can be used for magnetometry with nanometric spatial resolution. The presented theoretical model well describes the observed results.

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