Four-Photon Absorption Properties of Mn-Doped ZnSe Quantum Dots Ren, Sheng ; Ren, Yu ; Hu, Siyi ; Zhao, Yihua ; Shen, Binglin ; Hong, Liang ; Hu, Rui ; Zhou, Feifan ; Qu, Junle ; Liu, Liwei Abstract Publication: IEEE Photonics Journal Pub Date: April 2019 DOI: 10.1109/JPHOT.2019.2900255 Bibcode: 2019IPhoJ..1100255R