Especially, an effective three-photon and four-photon infrared quantum cutting of Er0.3Gd0.7VO4 crystalline excited by visible and near-violet light are found for the first time in the present paper.

更重要的是，我们首次发现了Er0.3 Gd 0.7 VO4晶体材料的可见激发的三光子的有效的红外量子剪裁现象和浅紫外激发的四光子的有效的红外量子剪裁现象。

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