中国物理B ›› 2022, Vol. 31 ›› Issue (6): 63201-063201.doi: 10.1088/1674-1056/ac5398
Wenjing Cheng(程文静)1,†, Yuan Li(李媛)1, Hongzhen Qiao(乔红贞)1, Meng Wang(王蒙)1, Shaoshuo Ma(马绍朔)1, Fangjie Shu(舒方杰)1, Chuanqi Xie(解传奇)2, and Guo Liang(梁果)1,3
Wenjing Cheng(程文静)1,†, Yuan Li(李媛)1, Hongzhen Qiao(乔红贞)1, Meng Wang(王蒙)1, Shaoshuo Ma(马绍朔)1, Fangjie Shu(舒方杰)1, Chuanqi Xie(解传奇)2, and Guo Liang(梁果)1,3
摘要: Enhancing the upconversion luminescence of rare earth ions is crucial for their applications in the laser sources, fiber optic communications, color displays, biolabeling, and biomedical sensors. In this paper, we theoretically study the resonance-mediated (1+2)-three-photon absorption in Pr3+ ions by a rectangle phase modulation. The results show that the resonance-mediated (1+2)-three-photon absorption can be effectively enhanced by properly designing the depth and width of the rectangle phase modulation, which can be attributed to the constructive interference between on-resonant and near-resonant three-photon excitation pathways. Further, the enhancement efficiency of resonance-mediated (1+2)-three-photon absorption can be affected by the pulse width (or spectral bandwidth) of femtosecond laser field, final state transition frequency, and absorption bandwidths. This research can provide a clear physical picture for understanding and controlling the multi-photon absorption in rare-earth ions, and also can provide theoretical guidance for improving the up-conversion luminescence.
中图分类号: (Coherent control of atomic interactions with photons)