A light-storage experiment with a total (storage and retrieval) efficiency η=58±5 is carried out by enclosing a sample, with a single pass absorption of 10%, in an impedance-matched cavity. The experiment is carried out using the Atomic Frequency Comb (AFC) technique in a praseodymium-doped crystal (0.05) and the cavity is created by reflection coating the crystal surfaces. The AFC technique has previously by far demonstrated the highest multi-mode capacity of all quantum memory concepts tested experimentally. We claim that the present work shows that it is realistic to create efficient, on-demand, long storage time AFC memories.
@article{arxiv.1301.0636,
title = {Efficient quantum memory using a weakly absorbing sample},
author = {Mahmood Sabooni and Qian Li and Stefan Kröll and Lars Rippe},
journal= {arXiv preprint arXiv:1301.0636},
year = {2015}
}