Optical coherence of 166Er:7LiYF4 crystal below 1 K

Optical coherence of 166Er:7LiYF4 crystal below 1 K
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DOI:
10.1088/1367-2630/aaa7e4
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发表时间:
2018-02-19
影响因子:
3.3
通讯作者:
Bushev, P. A.
Bushev, P. A.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kukharchyk, N.;Sholokhov, D.;Bushev, P. A.

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本文研究了同位素纯(166)Er:(LiYF 4)-Li-7晶体在1 K以下和< 0.3T弱磁场下的光学相干性和自旋动力学。晶体生长在我们的实验室,并表现出狭窄的非均匀光学展宽下降到16。MHz.具有如此窄线宽的固态原子系综对于实现非共振拉曼量子存储器以及超导量子电路和通信C波段光子的接口是非常有吸引力的。这两种应用都需要类似于10 mT的低磁场。然而,在常规实验温度T > 1.5。K,获得了Er:LYF晶体的光学相干性。10 μ s时间尺度仅在1.5 T以上的强磁场下。在目前的工作中,我们证明了Er:LYF晶体的深度冻结低于1 K的结果增加的光学相干时间,在弱场接近或等于100 μ s。
Weexplore optical coherence and spin dynamics of an isotopically purified (166) Er:(LiYF4)-Li-7 crystal below 1K and at weak magnetic fields < 0.3T. Crystals were grown in our lab and demonstrate narrow inhomogeneous optical broadening down to 16. MHz. Solid-state atomic ensembles with such narrow linewidths are very attractive for implementing of off-resonant Raman quantum memory and for the interfacing of superconducting quantum circuits and telecom C-band optical photons. Both applications require a low magnetic field of similar to 10 mT. However, at conventional experimental temperatures T > 1.5. K, optical coherence of Er:LYF crystal attains. 10 mu s time scale only at strong magnetic fields above 1.5 T. In the present work, we demonstrate that the deep freezing of Er:LYF crystal below 1 K results in the increase of optical coherence time to similar or equal to 100 mu s at weak fields.