Rah Yoonhyuk, Jin Yeonghoon, Kim Sejeong, Yu Kyoungsik
Opt Lett. 2019 Aug 1;44(15):3797-3800. doi: 10.1364/OL.44.003797.
Two-dimensional materials such as hexagonal boron nitride (h-BN), graphene, and transition metal dichalcogenides have drawn great attention in various fields of photonics and electronics. Among them, h-BN has recently emerged as a promising material platform to study integrated quantum photonics due to its ultrabright quantum light emission capabilities. However, the fundamental optical properties of h-BN have not yet been investigated in the visible and near-infrared (NIR) spectrum thoroughly. In this Letter, we report the refractive indices of h-BN thin films in the visible to NIR range. To the best of our knowledge, this is the first experimental observation of h-BN birefringence. Accurate parameters of refractive indices enable more precise design of h-BN-based photonic devices in the integrated photonics platforms.
诸如六方氮化硼（h-BN）、石墨烯和过渡金属二硫属化物等二维材料在光子学和电子学的各个领域引起了极大关注。其中，h-BN因其超亮的量子发光能力，最近已成为研究集成量子光子学的一个有前途的材料平台。然而，h-BN在可见光和近红外（NIR）光谱范围内的基本光学性质尚未得到充分研究。在本信函中，我们报告了h-BN薄膜在可见光到近红外范围内的折射率。据我们所知，这是对h-BN双折射的首次实验观测。准确的折射率参数能够在集成光子学平台中更精确地设计基于h-BN的光子器件。
