Optical decoherence and spectral diffusion at 1.5 μm in Er3+:Y2SiO5 versus magnetic field, temperature, and Er3+ concentration
Optical decoherence and spectral diffusion at 1.5 μm in Er3+:Y2SiO5 versus magnetic field, temperature, and Er3+ concentration
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DOI：
10.1103/physrevb.73.075101
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发表时间：
2006-02-01
影响因子：
3.7
通讯作者：
Cone, RL
中科院分区：
文献类型：
--
作者：
Böttger, T;Thiel, CW;Cone, RL
利用Er ~（3+）：Y_2SiO_5中1536 nm处I ~（-4）（15/2）-> I ~（-4）（13/2）的非均匀展宽跃迁，研究了光谱扩散对顺磁离子光学跃迁的影响.使用光子回波光谱，光谱扩散测量通过观察从1 μ s到20 ms的磁场强度从0.3到6.0 T，温度从1.6到6.5 K，和标称Er 3+浓度为0.0015%，0.005%和0.02%的时间尺度上的有效相干寿命的演变。为了了解光谱扩散对不同环境条件和材料成分的材料退相干的影响，比较了数据和模型，以确定光谱扩散机制和微观自旋动力学。观测结果成功地模拟了Er 3 +-Er 3+磁偶极相互作用和Er 3+电子自旋翻转的单声子直接过程。在4.2 K和更高的温度下，由于Y-89核自旋翻转的光谱扩散也被观察到。在描述我们的广泛的实验结果，使用简单的模型的成功提供了一个重要的能力，探索更大的参数空间，加速设计和优化材料的空间光谱全息，光谱烧孔设备。对光谱扩散机制和动力学的广泛了解适用于其他顺磁材料，例如含有Yb 3+或Nd 3+的材料。
The mechanisms and effects of spectral diffusion for optical transitions of paramagnetic ions have been explored using the inhomogeneously broadened 1536 nm I-4(15/2)-> I-4(13/2) transition in Er3+:Y2SiO5. Using photon echo spectroscopy, spectral diffusion was measured by observing the evolution of the effective coherence lifetimes over time scales from 1 mu s to 20 ms for magnetic-field strengths from 0.3 to 6.0 T, temperatures from 1.6 to 6.5 K, and nominal Er3+ concentrations of 0.0015%, 0.005%, and 0.02%. To understand the effect of spectral diffusion on material decoherence for different environmental conditions and material compositions, data and models were compared to identify spectral diffusion mechanisms and microscopic spin dynamics. Observations were successfully modeled by Er3+-Er3+ magnetic dipole interactions and Er3+ electron spin flips driven by the one-phonon direct process. At temperatures of 4.2 K and higher, spectral diffusion due to Y-89 nuclear spin flips was also observed. The success in describing our extensive experimental results using simple models provides an important capability for exploring larger parameter spaces, accelerating the design and optimization of materials for spatial-spectral holography, and spectral hole-burning devices. The broad insight into spectral diffusion mechanisms and dynamics is applicable to other paramagnetic materials, such as those containing Yb3+ or Nd3+.