论文标题
非线性光学元件
Large few-layer hexagonal boron nitride flakes for nonlinear optics
论文作者
论文摘要
六角硼硝酸盐（HBN）是一种分层的介电材料，具有多种光学和光子学应用。在这项工作中，我们演示了一种用于几层HBN薄片的制造方法，其面积高达5000 $ \rmμm$。我们表明，这种形式的HBN可以与光子微结构集成：例如，我们使用圆形的bragg光栅（CBG）。 CBG上去角质HBN薄片的层质量通过第二谐波生成（SHG）显微镜证实。我们表明，在CBG外的HBN样品中，SHG信号在CBG中心的HBN样品中均匀。
Hexagonal boron nitride (hBN) is a layered dielectric material with a wide range of applications in optics and photonics. In this work, we demonstrate a fabrication method for few-layer hBN flakes with areas up to 5000 $\rm μm$. We show that hBN in this form can be integrated with photonic microstructures: as an example, we use a circular Bragg grating (CBG). The layer quality of the exfoliated hBN flake on a CBG is confirmed by second-harmonic generation (SHG) microscopy. We show that the SHG signal is uniform across the hBN sample outside the CBG and is amplified in the centre of the CBG.
