Presentation Information
[25p-12P-13]Improvement of Atomic-Frequency-Comb memory efficiency in low concentration 167Er3+:Y2SiO5
〇(DC)Shouichirou Yasui1,2, Tomohiro Inaba1, Atsushi Isizawa3, Kenichi Hitatchi1, Hiroo Omi4, Kyuma Matsuura2, Reina Kaji2, Takehiko Tawara3, Satoru Adachi2, Xuejun Xu1, Haruki Sanada1 (1.NTT BRL, 2.Grad. Sch. Eng., Hokkaido Univ., 3.Nihon Univ., 4.Yamato Univ.)
Keywords:
Optical quantum memory,Rare earth ion doped crystal,Atomic frequency comb
Recently, optical quantum memory (QM), which can temporarily store quantum information, has been actively investigated for the development of global quantum information networks. We have been studying Atomic frequency comb (AFC)-based QM. The low concentration of 167Er3+:Y2SiO5 crystal used as a sample is expected to have a long memory time, but it is difficult to achieve high memory efficiency. In this study, we report that we have achieved 18% memory efficiency in low concentration 167Er3+:Y2SiO5 by electron and nuclear spin polarization and sample length elongation.