标题： 扭曲黑磷同质结构中的明亮偶极子激子 显示英文标题

标题： Bright dipolar excitons in twisted black phosphorus homostructures

摘要： 亮偶极子激子含有电偶极子且具有高振子强度，是研究相关量子现象的理想平台。 它们通常依赖于两个量子阱之间或两层之间的载流子隧穿，与非偶极子激子杂化以获得振子强度。 在这项工作中，我们通过堆叠90层{\deg }扭曲的黑磷（BP）结构，发现了一种新型的亮红外偶极子激子。 这些激子源于重构后的能带结构，表现出高振子强度。 最重要的是，它们继承了黑磷的线性偏振特性，这使得可以利用光偏振来选择偶极子的方向。 此外，偶极矩和共振能量可以通过黑磷的厚度进行广泛调节。 我们的研究结果展示了一个用于探索可调谐相关偶极子激子的有用平台。 显示英文摘要

摘要： Bright dipolar excitons, which contain electrical dipoles and have high oscillator strength, are an ideal platform for studying correlated quantum phenomena. They usually rely on carrier tunneling between two quantum wells or two layers to hybridize with nondipolar excitons to gain oscillator strength. In this work, we uncovered a new type of bright infrared dipolar exciton by stacking 90{\deg}-twisted black phosphorus (BP) structures. These excitons, inherent to the reconstructed band structure, exhibit high oscillator strength. Most importantly, they inherit the linear polarization from BP, which allows light polarization to be used to select the dipole direction. Moreover, the dipole moment and resonance energy can be widely tuned by the thickness of the BP. Our results demonstrate a useful platform for exploring tunable correlated dipolar excitons.