Second-harmonic generation in multilayer hexagonal boron nitride flakes
In this Letter, we report the second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109–111 layers. The resulting effective second-order susceptibility is similar to previously reported few-layer experiments. This confirms that thick hBN flakes can serve...
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Veröffentlicht in: | Optics letters 2019-12, Vol.44 (23), p.5792-5795 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | In this Letter, we report the second-harmonic generation (SHG) from thick hexagonal boron nitride (hBN) flakes with approximately 109–111 layers. The resulting effective second-order susceptibility is similar to previously reported few-layer experiments. This confirms that thick hBN flakes can serve as a platform for nonlinear optics, which is useful because thick flakes are easy to exfoliate while retaining a large size. We also show spatial second-harmonic maps revealing that SHG remains a useful tool for the characterization of the layer structure, even in the case of a large number of layers. |
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ISSN: | 0146-9592 1539-4794 |
DOI: | 10.1364/OL.44.005792 |