Move the stored photons here and there

Generation & control of DSP spatial modes.

We collaborate with Gediminas Juzeliūnas (Vilnius university), Teodora Kirova (University of Latvia), I-Kang Liu (Newcastle university), and Yu-Ju Lin (IAMS) to investigate the generation and dynamical control of spatial modes for neutral dark-state polaritons (DSPs) using electromagnetically induced transparency. We demonstrated how a combination of synthetic scalar and vector potentials can be used to engineer discrete spatial modes of dark-state polaritons, enabling coherent quantum interference between them. We verified this approach by showing Rabi oscillations between two spatial modes and stimulated Raman adiabatic passage among three Λ-type modes. This method enables the spatial reallocation of stored photonic information, offering potential applications in photonic memory optimization and light retrieval modulation within electromagnetically induced transparency systems. This work is published in Opt. Lett. 50, 4302 (2025).