| Autor: |
Gao L; College of Material, Chemistry, and Chemical Engineering, Hangzhou Normal University, No. 2318 Yuhangtang Rd., Cangqian, Yuhang District, Hangzhou 311121, China., Chen H; College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P.R. China., Kuklin AV; Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden.; International Research Center of Spectroscopy and Quantum Chemistry (IRC SQC), Siberian Federal University, 79 Svobodny pr., Krasnoyarsk 660041, Russia., Wageh S; Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Al-Ghamdi AA; Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia., Ågren H; Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden.; College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China., Zhang H; College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P.R. China. |
| Abstrakt: |
Despite the emerging interest in research and development of Ti 3 CN MXene nanosheet (NS)-based optoelectronic devices, there is still a lack of in-depth studies of the underlying photophysical processes, like carrier relaxation dynamics and nonlinear photon absorption, operating in such devices, hindering their further and precise design. In this paper, we attempt to remedy the situation by fabricating few-layer Ti 3 CN NSs via combining selective etching and molecular intercalation and by investigating the carrier relaxation possesses and broadband nonlinear optical responses via transient absorption and Z-scan techniques. These results are complemented by first-principle theoretical analyses of the optical properties. Both saturable absorption and reverse saturable absorption phenomena are observed due to multiphoton absorption effects. The analysis of these results adds to the understanding of the basic photophysical processes, which is anticipated to be beneficial for the further design of MXene-based devices. |
