论文标题
激子在二维过渡金属二分法纳米泡中的光学特性
Optical properties of exciton in two-dimensional transition metal dichalcogenide nanobubbles
论文作者
论文摘要
二维（2D）过渡金属二北元（TMD）中的应变已导致具有令人兴奋的光学特性的局部状态，特别是设计一个光子源。 MOS2单层自然形成的HBN底物上废除的，导致在紧张区域中降低带隙，从而产生纳米泡。因此，光生成的颗粒限制在应变诱导的电位中。使用数值对角线化，我们模拟了受到激子状态的光谱，它们的振荡器强度和辐射寿命。我们表明，单一的受激子的单个状态是光学活跃的，这表明MOS2/HBN纳米泡是实现单光子源的良好候选者。此外，由于限制效应，激子结合能，振荡器强度和辐射寿命得到了增强。
Strain in two-dimensional (2D) transition metal dichalcogenide (TMD) has led to localized states with exciting optical properties, in particular in view of designing one photon sources. The naturally formed of the MoS2 monolayer deposed on hBN substrate leads to a reduction of the bandgap in the strained region creating a nanobubble. The photogenerated particles are thus confined in the strain-induced potential. Using numerical diagonalization, we simulate the spectra of the confined exciton states, their oscillator strengths and radiative lifetimes. We show that a single state of the confined exciton is optically active, which suggests that the MoS2/hBN nanobubble is a good candidate for the realisation of single-photon sources. Furthermore, the exciton binding energy, oscillator strength and radiative lifetime are enhanced due to the confinement effect.
