Towards an eficient atomic frequency comb quantum memory
Amari, A. · Walther, A. · Sabooni, M. · Huang, M. · Kröll, S. · Afzelius, M. · Usmani, I. · Lauritzen, B. · Sangouard, N. · de Riedmatten, H. · Gisin, N.
Original · EN
We present an efficient photon-echo experiment based on atomic frequency combs [Phys. Rev. A 79, 052329 (2009)]. Echoes containing an energy of up to 35% of that of the input pulse are observed in a Pr3+-doped Y2SiO5 crystal. This material allows for the precise spectral holeburning needed to make a sharp and highly absorbing comb structure. We compare our results with a simple theoretical model with satisfactory agreement. Our results show that atomic frequency combs has the potential for high-efficiency storage of single photons as required in future long-distance communication based on quantum repeaters.
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