Simultaneous three-photon-excited violet upconversion luminescence of Ce^3+:Lu_2Si_2O_7 single crystals by femtosecond laser irradiation
- Resource Type
- Article
- Authors
- Dong, Yongjun; Xu, Jun; Zhao, Guangjun; Yan, Chenfeng; Zhou, Guoqing; Su, Liangbi; Yang, Luyun; Qiu, Jianrong; Lin, Lihuang; Liang, Xiaoyan; Li, Ruxin; Xu, Zhizhan; Ren, Qiushi
- Source
- Optics Letters; July 2006, Vol. 31 Issue: 14 p2175-2177, 3p
- Subject
- Language
- ISSN
- 01469592; 15394794
We found that Ce^3+:Lu_2Si_2O_7 single crystals could be excited at 800 nm by using a femtosecond Ti:sapphire laser. The emission spectra of Ce^3+:Lu_2Si_2O_7 crystals were the same for one-photon excitation at 267 nm as for excitation at 800 nm. The emission intensity of Ce^3+:Lu_2Si_2O_7 crystals was found to depend on the cube of the laser power at 800 nm, consistent with simultaneous absorption of three 800 nm photons. The measured value of the three-photon absorption cross section is σ'_3=2.44×10^-77 cm^6 s^2.