Monolayer WSe₂ hosts bright single-photon emitters. Because of its compliance, monolayer WSe₂ conforms to patterned substrates without breaking, thus creating the potential for large local strain, which is one activation mechanism of its intrinsic quantum emitters. Here, we report an approach to creating spatially isolated quantum emitters from WSe₂ monolayers that display clean spectra with little detrimental background signal. We show that a bilayer of hexagonal boron nitride and WSe₂ placed on a nanostructured substrate can be used to create and shape wrinkles that communicate local strain to WSe₂, thus creating quantum emitters that are isolated from substrate features. We compare quantum emitters created directly on top of substrate features with quantum emitters formed along wrinkles and find that the spectra of the latter consist of mainly a single peak and a low background fluorescence. We also discuss possible approaches to controlling the emitter position along hexagonal boron nitride wrinkles.

中文翻译：

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使用六方氮化硼皱纹的单个二硒化钨量子发射体的光谱和空间隔离

单层WSe ₂承载明亮的单光子发射器。由于其顺应性，单层WSe _2可以顺应图案化的基材而不会破裂，因此可产生较大的局部应变，这是其固有量子发射器的一种激活机制。在这里，我们报告一种从WSe ₂单层创建空间隔离的量子发射器的方法，该发射器显示干净的光谱且几乎没有有害的背景信号。我们显示了六边形氮化硼和WSe ₂的双层结构，可以将其放置在纳米结构的基底上，以创建和塑造将局部应变传递给WSe _2的皱纹，从而创建与衬底特征隔离的量子发射器。我们将直接在基底特征顶部创建的量子发射器与沿皱纹形成的量子发射器进行了比较，发现后者的光谱主要由单个峰和低背景荧光组成。我们还将讨论控制六边形氮化硼皱纹发射极位置的可能方法。