Quantum cutting mechanism in NaYF4:Tb3+, Yb3+ |
| |
Authors: | Duan Qianqian Qin Feng Zhang Zhiguo Cao Wenwu |
| |
Affiliation: | Condensed Matter Science and Technology Institute, Harbin Institute of Technology, Harbin, China. |
| |
Abstract: | A quantum cutting mechanism for the sublinear near-IR power dependence property in Tb3+-Yb3+ codoped NaYF4 powders were investigated both experimentally and theoretically. The slopes of Yb3+ luminescence intensity versus excitation power were fitted to be between 0.5 and 1. We have developed a quantum cutting rate equation model to explain the anomalous sublinear phenomenon and an assessment factor was introduced to help understand the physical mechanism. Experimental results showed that the linear downconversion process combined with second-order nonlinear process induced the sublinear power dependence property with the latter to be the dominant process. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|