Mendelson Noah, Doherty Marcus, Toth Milos, Aharonovich Igor, Tran Toan Trong
School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
Laser Physics Centre, Research School of Physics, Australian National University, Canberra, ACT, 2601, Australia.
Adv Mater. 2020 May;32(21):e1908316. doi: 10.1002/adma.201908316. Epub 2020 Apr 9.
Quantum emitters in hexagonal boron nitride (hBN) are promising building blocks for the realization of integrated quantum photonic systems. However, their spectral inhomogeneity currently limits their potential applications. Here, tensile strain is applied to quantum emitters embedded in few-layer hBN films and both red and blue spectral shifts are realized with tuning magnitudes up to 65 meV, a record for any 2D quantum source. Reversible tuning of the emission and related photophysical properties is demonstrated. Rotation of the optical dipole in response to strain is also observed, suggesting the presence of a second excited state. A theoretical model is derived to describe strain-based tuning in hBN, and the rotation of the optical dipole. The study demonstrates the immense potential for strain tuning of quantum emitters in layered materials to enable their employment in scalable quantum photonic networks.
六方氮化硼（hBN）中的量子发射器是实现集成量子光子系统的有前途的构建块。然而，它们目前的光谱不均匀性限制了其潜在应用。在此，对嵌入少层hBN薄膜中的量子发射器施加拉伸应变，实现了红移和蓝移，调谐幅度高达65毫电子伏特，这是任何二维量子源的记录。证明了发射和相关光物理性质的可逆调谐。还观察到光学偶极子响应应变的旋转，表明存在第二个激发态。推导了一个理论模型来描述hBN中基于应变的调谐以及光学偶极子的旋转。该研究证明了层状材料中量子发射器的应变调谐在可扩展量子光子网络中的巨大潜力。
