On-chip hollow-core waveguides represent a promising platform for microfluidic analysis, nonlinear optics and quantum information processing, due to light guidance directly inside the medium of interest. Recently, we have reported a 3D printed hollow-core waveguide ⎯ light cage ⎯ which consists of a ring of high-aspect-ratio cylinders and combines a high fraction of field in the core (>99%) with transverse access. Here we will discuss our results on interfacing light cages with optical fibers, the measurement of electromagnetically induced transparency within light cages filled with alkali vapour, the potential of the light cage concept for spectroscopy and nanoparticle tracking analysis.
Quantum memories are a key tool for optical quantum information processing. Several physical implementations have been suggested. Photonic nano- and microstructures can significantly improve light matter interaction and in this way facilitate efficient photon storage. In this presentation we will introduce a photonics light cage as an engineered photonic structure to improve the performance of quantum memories based on warm atomic (Cs) vapor. Based on first results we derive the improved storage parameters of such a device and discuss prospect for integration into quantum networks.
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