The Third-Order Nonlinear Optical Properties of Sb2S3/RGO Nanocomposites

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....

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Bibliographic Details
Published in:Photonics 2022-03, Vol.9 (4), p.213
Main Authors: Li, Liushuang, Yuan, Ye, Wu, Jiawen, Zhu, Baohua, Gu, Yuzong
Format: Article
Language:English
Subjects:
Absorption
Antimony
Charge transfer
Chemical bonds
Fourier transforms
Graphene
Lasers
Mode locking
Morphology
Nanocomposites
Nanoparticles
Neodymium lasers
Nonlinear optics
Optical properties
Optics
Photon absorption
Pulsed lasers
Raman spectroscopy
saturable absorption
Sb2S3/RGO composite
Scanning electron microscopy
Spectrum analysis
susceptibility
Switches
third-order nonlinear optical property
Ultrasonic imaging
YAG lasers
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Summary: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 × 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.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9040213