Nearly two orders of magnitude decrease of the visible emission of GdF₃:ErF₃ nanoparticles under 797 nm laser excitation is experimentally observed with an external magnetic field (MF) up to about 1.3 T at room temperature. Transmission measurement of the excitation laser indicates that the MF induced luminescence suppression in the prepared nanoparticles is mainly due to the decreased absorption of the excitation photons. This ultrahigh luminescence sensitivity to MF is rather suitable for locally and optically sensing of intermediate MFs in nanoscale volumes with high field-resolution and can find practical applications in other related areas.

中文翻译：

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用中间磁场抑制 GdF ₃ :ErF ₃纳米粒子中的可见光发光

GdF ₃ :ErF ₃纳米粒子在797 nm激光激发下的可见光发射降低了近两个数量级，在室温下使用高达约1.3 T的外部磁场(MF)通过实验观察到。激发激光的透射测量表明所制备的纳米颗粒中的 MF 诱导发光抑制主要是由于激发光子的吸收减少。这种对 MF 的超高发光灵敏度非常适用于具有高场分辨率的纳米级中间 MF 的局部和光学传感，并且可以在其他相关领域找到实际应用。