Electromagnetically Induced Transparency and Optical Pumping in the Hyperfine Paschen-Back Regime

Abstract

We report spectroscopy experiments of rubidium vapor in a high magnetic field under conditions of electromagnetically induced transparency (EIT) and optical pumping. The 1.1 T static magnetic field decouples nuclear and electronic spins and shifts each magnetic state via the Zeeman effect, allowing us to resolve individual optical transitions of the D${}_2$ line in a Doppler-broadened medium. By varying the control laser power driving one leg of a spectrally isolated $\Lambda$ system we tune the vapor from the EIT regime to conditions of Autler-Townes line splitting. The resulting spectra conform to simple three-level models demonstrating the effective simplification of the energetic structure. Further, we quantify the viability of state preparation via optical pumping on nuclear spin-forbidden transitions. We conclude that the ``cleanliness'' of this system greatly enhances the capabilities of quantum control in hot vapor, offering advantages in a broad variety of quantum applications plagued by spurious light-matter interaction processes, such as atomic quantum memories for light.

arXiv comment10 pages, 7 figures

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Cited by in corpus (3)

• Optical Memory in a Microfabricated Rubidium Vapor Cell
• Indirect measurement of atomic magneto-optical rotation via Hilbert transform
• Single-Photon-Level Atomic Frequency Comb Storage in Room Temperature Alkali Vapour