Journal
JOURNAL OF APPLIED PHYSICS
Volume 125, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5053721
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Funding
- Department of Science and Technology [EMR/2016/002520]
- DAE BRNS [37(3)/14/26/2016-BRNS/37245]
- International Materials Institute for New Functionality in Glass at Lehigh University
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Nanosheet-nanowire heterostructure provides a new platform to explore the nonlinear optical phenomena at the nanoscale. In this article, we report giant nonlinear absorption (NLA) coefficient approximate to 0.94 x 10(3) cm/GW at 1064 nm and 0.64 x 10(3) cm/GW at 532 nm in a new type of heterostructure of two-dimensional graphene oxide (GO) nanosheets and one-dimensional Sb2Se3 nanowires prepared by a facile hydrothermal method. The giant enhancement of NLA by the heterostructure is attributed to synergistic charge transfer between the Sb2Se3 nanowire and GO nanosheet through the donor-acceptor interaction. With this idea, we have developed a five-level rate equation model and numerically simulated the results. Strikingly, the heterostructure shows an excellent benchmark for the optical limiting onset of 8 mJ/cm(2) at 1064 nm and 20 mJ/cm(2) at 532 nm, that is, an order of magnitude better than graphene based materials, 2D transition metal dichalcogenides, and metal nanoparticles over a broad spectral range. Published under license by AIP Publishing.
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