Competition between stimulated Brillouin scattering and two-photon absorption in dispersed boron nitride

The design of transparent optical materials with stimulated Brillouin scattering (SBS) suppression is a topic of current interest. We measured two-photon absorption (2PA) cross-section σ and Brillouin gain factor g of a suspension of hexagonal boron nitride (hBN) in N-methyl-2-pyrrolidone at the sec...

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Bibliographic Details
Published in:Optics express 2019-04, Vol.27 (8), p.11029-11036
Main Authors: Kislyakov, Ivan M, Nunzi, Jean-Michel, Zhang, Xiaoyan, Xie, Yafeng, Bocharov, Vladimir N, Wang, Jun
Format: Article
Language:English
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Summary:The design of transparent optical materials with stimulated Brillouin scattering (SBS) suppression is a topic of current interest. We measured two-photon absorption (2PA) cross-section σ and Brillouin gain factor g of a suspension of hexagonal boron nitride (hBN) in N-methyl-2-pyrrolidone at the second harmonic of a Nd:YAG laser. SBS exhibits a significant quenching with hBN concentration, like previously observed in graphene suspension. The melting of hBN flakes due to a large 2PA and the related changes in the acoustic damping coefficient explain the quenching mechanism.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.011029