Rare-earth doped crystals have numerous applications ranging from frequency metrology to quantum information processing. To fully benefit from their exceptional coherence properties, the effect of mechanical strain on the energy levels of the dopants - whether it is a resource or perturbation - needs to be considered. We demonstrate that by applying uniaxial stress to a rare-earth doped crystal containing a spectral hole, we can shift the hole by a controlled amount that is larger than the width of the hole. We deduce the sensitivity of $\rm Eu^{3+}$ ions in an $\rm Y_2SiO_5$ matrix as a function of crystal site and the crystalline axis along which the stress is applied.

中文翻译：

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通过单轴应力对稀土掺杂晶体的超窄谱特征进行机械可调

稀土掺杂晶体具有从频率计量到量子信息处理的众多应用。为了充分利用它们出色的相干特性，需要考虑机械应变对掺杂剂能级的影响（无论是资源还是微扰）。我们证明，通过对包含光谱孔的稀土掺杂晶体施加单轴应力，我们可以使孔移位大于孔宽度的受控量。我们推导了在\ rm Y_2SiO_5 $矩阵中的$ \ rm Eu ^ {3 +} $离子的灵敏度与晶体位点和施加应力的晶轴的关系。