Generation and coherent control of dark-state spatial modes

The generation and dynamic control of the spatial mode of the dark-state polarization using electromagnetically induced transparency are theoretically investigated. We demonstrate that a combination of synthetic scalar and vector potentials can be employed to engineer discrete spatial modes of the dark-state polariton, enabling quantum interference among these modes. We verify this concept by showing the Rabi oscillation between two spatial modes and stimulated Raman adiabatic passage among Λ-type three modes. Our approach allows for the reallocation of stored photonic data from one location to another, presenting potential applications such as photonic-memory optimization and retrieved light modulation.