石油化工高等学校学报2023，Vol.36Issue(6)：73-82,10.DOI:10.12422/j.issn.1006-396X.2023.06.008
转角双层石墨烯纳米片单、双光子吸收特性研究
One and Two-Photon Absorption Properties of Twist Bilayer Graphene Nanosheets
摘要
Abstract
Based on the first principles and wave function analysis theory,the one-photon absorption(OPA)spectra and two-photon absorption(TPA)spectra of the zigzag boundaries Twisted Bilayer Graphene Nanosheets(Z-TwBLG-NS)with different twist angles and their electronic excitation characteristics were studied.Firstly,the law and properties of the change of one-photon absorption spectrum and two-photon absorption spectrum with different twist angle were studied.Secondly,the characteristics of electron transition were analyzed visually.The results show that the absorption peaks are red-shifted to different degrees when the angle is not 0°,indicating that the angle modulates the absorption spectra of the system.The Z-TwBLG-NS with an angle of no 0° had obvious boundary effect,and the isosurface of electrons and holes were mainly distributed at the edge.Finally,the limiting effect of moiré pattern on electron transfer was revealed,which was reflected in the difference in the density of electrons and holes gathered in the moiré pattern.This study provides the analytical basis of physical mechanism for the generation of optical properties of Z-TwBLG-NS under the control of twist angle,as well as a research methodology for related research work.关键词
转角双层石墨烯/边界效应/单光子吸收/双光子吸收Key words
Twist bilayer graphene/Boundary effect/One-photon absorption/Two-photon absorption分类
化学化工引用本文复制引用
杨志远,邹怡,王金刚..转角双层石墨烯纳米片单、双光子吸收特性研究[J].石油化工高等学校学报,2023,36(6):73-82,10.基金项目
辽宁省自然科学基金面上项目(2022-MS-363) （2022-MS-363）
辽宁省教育厅基本科研项目(LJKMZ20220735) （LJKMZ20220735）
2023年度辽宁省教育厅高校基本科研项目(JYTMS20231431). （JYTMS20231431）
