期刊
OPTICS LETTERS
卷 44, 期 23, 页码 5792-5795出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.44.005792
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资金
- Australian Research Council [DE180100070, DP190101058]
- Australian Research Council [DE180100070] Funding Source: Australian Research Council
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. (C) 2019 Optical Society of America
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