Faraday Filtering on the Cs-D${}_1$-Line for Quantum Hybrid Systems

Abstract

Narrow-band filtering of light is widely used in optical spectroscopy. Atomic filters, which rely on the Faraday effect, allow for GHz-wide transmission spectra, which are intrinsically matched to an atomic transition. We present an experimental realization and a theoretical study of a Faraday anomalous dispersion optical filter (FADOF) based on cesium and its D${}_1$-line-transition ($6^2{S}_{1/2}\to 6^2{P}_{1/2}$) around 894nm. We also present the prospects and visions for combining this filter with the single photon emission of a single quantum dot (QD), which matches with the atomic transition.

4 pages, 3 figures