期刊
PHOTONICS
卷 9, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/photonics9040213
关键词
Sb2S3/RGO composite; graphene; third-order nonlinear optical property; saturable absorption; susceptibility
类别
资金
- National Natural Science Foundation of China [61875053, 61404045, U1404624]
- Excellent Youth Project of Henan Province of China [202300410047]
Antimony sulfide/reduced graphene oxide (Sb2S3/RGO) nanocomposites were synthesized, and their tunable nonlinear optical properties were investigated. The results showed that the addition of graphene changed the absorption properties of the composites, and the third-order nonlinear susceptibilities were also tunable with the concentration of graphene. These tunable properties make the Sb2S3/RGO composites applicable to photonic devices.
Antimony sulfide/reduced graphene oxide (Sb2S3/RGO) nanocomposites were synthesized via a facile, one-step solvothermal method. XRD, SEM, FTIR, and Raman spectroscopy were used to characterize the uniform distribution of Sb2S3 nanoparticles on the surface of graphene through partial chemical bonds. The third-order nonlinear optical (NLO) properties of Sb2S3, RGO, and Sb2S3/RGO samples were investigated by using the Z-scan technique under Nd:YAG picosecond pulsed laser at 532 nm. The results showed that pure Sb2S3 particles exhibited two-photon absorption (TPA), while the Sb2S3/RGO composites switched to variable saturated absorption (SA) properties due to the addition of different concentrations of graphene. Moreover, the third-order nonlinear susceptibilities of the composites were also tunable with the concentration of the graphene. The third-order nonlinear susceptibility of the Sb2S3/RGO sample can achieve 8.63 x 10(-12) esu. The mechanism for these properties can be attributed to the change of the band gap and the formation of chemical bonds supplying channels for photo-induced charge transfer between Sb2S3 nanoparticles and the graphene. These tunable NLO properties of Sb2S3/RGO composites can be applicable to photonic devices such as Q-switches, mode-locking devices, and optical switches.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据