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

TL;DR

This paper reports on the development and analysis of a Faraday anomalous dispersion optical filter based on cesium's D1 line, with potential applications in quantum hybrid systems involving single photon sources.

Contribution

It provides both experimental and theoretical insights into a cesium-based FADOF at 894nm and explores its integration with quantum dot single photon emission.

Findings

Demonstrated a cesium FADOF at 894nm with GHz-wide transmission.

Theoretical analysis of the filter's properties and performance.

Discussed potential integration with quantum dot single photon sources.

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 ($6^2S_{1/2}\rightarrow6^2P_{1/2}$) 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.