| Demonstration of atomic frequency comb memory for light with spin-wave storage (2009) | |||||||||
Abstract | |||||||||
| We present a light-storage experiment where the light is mapped onto an inhomogeneously broadened optical transition in a praseodymium-doped crystal, which is shaped into an atomic frequency comb. After absorption of the light the optical excitation is converted into a spin-wave excitation by a control pulse. A second pulse reads the memory (on-demand) by reconverting the excitation to an optical one, where the comb structure causes a photon-echo type rephasing of the dipole moments and efficient directional retrieval of the light. This combination of photon echo and spin-wave storage allow us to store sub-microsecond (450ns) pulses for up to 20 $\mu$s. The scheme has a high potential for storing multiple temporal modes in the single photon regime, which is an important resource for future long-distance quantum communication based on quantum repeaters.. Comment: 4 pages, 5 figures | |||||||||
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