Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites
The composite of graphene and semiconductor nanoparticles has attracted increasing interest in the search for novel nonlinear optical materials. Herein, composites of reduced graphene oxide (RGO) and SnO _2 nanoparticles with different mass ratios were synthesized via a facile hydrothermal method. T...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ac9a25 |
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| author | Shihao Chen Baohua Zhu Tinglun Xing Jiejuan Yang Yuzong Gu |
| author_facet | Shihao Chen Baohua Zhu Tinglun Xing Jiejuan Yang Yuzong Gu |
| author_sort | Shihao Chen |
| collection | DOAJ |
| description | The composite of graphene and semiconductor nanoparticles has attracted increasing interest in the search for novel nonlinear optical materials. Herein, composites of reduced graphene oxide (RGO) and SnO _2 nanoparticles with different mass ratios were synthesized via a facile hydrothermal method. The structural morphology and basic physical properties of the SnO _2 /RGO composites were characterized using TEM, SEM, XRD, Raman, XPS and UV–Vis spectra, indicating that SnO _2 nanoparticles were uniformly anchored on the surface of graphene nanosheets through covalent and partial-ionic bonds. The third-order optical nonlinearities of the composites were studied for the first time by the Z-scan technique using a picosecond laser at 532 nm. It was found that the composites demonstrated saturable absorption and positive nonlinear refraction properties, and both were significantly enhanced compared with pure SnO _2 nanoparticles and RGO nanosheets, and the enhancement was tunable with the variation of SnO _2 :GO mass ratio. The maximum saturable absorption coefficient and the third-order susceptibility of the as-prepared SnO _2 /RGO composites were obtained to be −2.93×10 ^–11 m W ^−1 and 2.25 × 10 ^–11 esu, respectively. The maximum saturable absorption modulation depth obtained was 10% with the corresponding saturation light intensity of 0.3 GW cm ^−2 . Moreover, the optimised third-order susceptibility of SnO _2 /RGO was found much greater than many other materials ever studied. Several involved factors contributing to the nonlinearities were discussed. The results propose that the third-order optical nonlinearities of SnO _2 /RGO and other similarly structured composites can be potentially tuned to meet certain application requirements of nonlinear optical devices by controlling the mass ratio of semiconductor to graphene. |
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| id | doaj.art-e3c49c77365f4cc39023b8c63922e9c4 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:34:52Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-e3c49c77365f4cc39023b8c63922e9c42023-08-09T16:16:53ZengIOP PublishingMaterials Research Express2053-15912022-01-0191010620110.1088/2053-1591/ac9a25Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO compositesShihao Chen0https://orcid.org/0000-0001-5373-919XBaohua Zhu1https://orcid.org/0000-0003-0422-1372Tinglun Xing2https://orcid.org/0000-0002-2964-0437Jiejuan Yang3Yuzong Gu4https://orcid.org/0000-0002-7107-5187School of Physics and Electronics, Henan University , Kaifeng 475004, People’s Republic of ChinaSchool of Physics and Electronics, Henan University , Kaifeng 475004, People’s Republic of ChinaSchool of Physics and Electronics, Henan University , Kaifeng 475004, People’s Republic of ChinaSchool of Physics and Electronics, Henan University , Kaifeng 475004, People’s Republic of China; School of Software, Henan University , Kaifeng 475004, People’s Republic of ChinaSchool of Physics and Electronics, Henan University , Kaifeng 475004, People’s Republic of ChinaThe composite of graphene and semiconductor nanoparticles has attracted increasing interest in the search for novel nonlinear optical materials. Herein, composites of reduced graphene oxide (RGO) and SnO _2 nanoparticles with different mass ratios were synthesized via a facile hydrothermal method. The structural morphology and basic physical properties of the SnO _2 /RGO composites were characterized using TEM, SEM, XRD, Raman, XPS and UV–Vis spectra, indicating that SnO _2 nanoparticles were uniformly anchored on the surface of graphene nanosheets through covalent and partial-ionic bonds. The third-order optical nonlinearities of the composites were studied for the first time by the Z-scan technique using a picosecond laser at 532 nm. It was found that the composites demonstrated saturable absorption and positive nonlinear refraction properties, and both were significantly enhanced compared with pure SnO _2 nanoparticles and RGO nanosheets, and the enhancement was tunable with the variation of SnO _2 :GO mass ratio. The maximum saturable absorption coefficient and the third-order susceptibility of the as-prepared SnO _2 /RGO composites were obtained to be −2.93×10 ^–11 m W ^−1 and 2.25 × 10 ^–11 esu, respectively. The maximum saturable absorption modulation depth obtained was 10% with the corresponding saturation light intensity of 0.3 GW cm ^−2 . Moreover, the optimised third-order susceptibility of SnO _2 /RGO was found much greater than many other materials ever studied. Several involved factors contributing to the nonlinearities were discussed. The results propose that the third-order optical nonlinearities of SnO _2 /RGO and other similarly structured composites can be potentially tuned to meet certain application requirements of nonlinear optical devices by controlling the mass ratio of semiconductor to graphene.https://doi.org/10.1088/2053-1591/ac9a25SnO2grapheneoptical nonlinearitytunableZ-scan |
| spellingShingle | Shihao Chen Baohua Zhu Tinglun Xing Jiejuan Yang Yuzong Gu Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites Materials Research Express SnO2 graphene optical nonlinearity tunable Z-scan |
| title | Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites |
| title_full | Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites |
| title_fullStr | Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites |
| title_full_unstemmed | Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites |
| title_short | Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites |
| title_sort | mass ratio dependently tunable enhancement of the optical nonlinearities of sno2 rgo composites |
| topic | SnO2 graphene optical nonlinearity tunable Z-scan |
| url | https://doi.org/10.1088/2053-1591/ac9a25 |
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