Demonstration of atomic frequency comb memory for light with spin-wave storage

Details Demonstration of atomic frequency comb memory for light with spin-wave storage Demonstration of atomic frequency comb memory for light with spin-wave storage

2009-08-17

arxiv.org/abs/0908.2309v2

Phys. Rev. Lett. 104, 040503 (2010)

Physics

Quantum Physics

Final version. 4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.104.040503

We present a light-storage experiment in a praseodymium-doped crystal where the light is mapped onto an inhomogeneously broadened optical transition 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 control pulse reads the memory (on-demand) by reconverting the spin-wave excitation to an optical one, where the comb structure causes a photon-echo type rephasing of the dipole moments and directional retrieval of the light. This combination of photon echo and spin-wave storage allows us to store sub-microsecond (450ns) pulses for up to 20 microseconds. 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.

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