Yu Yi, Ge Junyu, Luo Manlin, Seo In Cheol, Kim Youngmin, Eng John J H, Lu Kunze, Wei Tian-Ran, Lee Seok Woo, Gao Weibo, Li Hong, Nam Donguk
School of Electrical and Electronic Engineering, Nanyang Technological University (NTU), Singapore 639798.
School of Mechanical and Aerospace Engineering, Nanyang Technological University (NTU), Singapore 639798.
Nano Lett. 2025 Mar 5;25(9):3438-3444. doi: 10.1021/acs.nanolett.4c05450. Epub 2025 Feb 18.
Two-dimensional (2D) materials have emerged as promising candidates for next-generation integrated single-photon emitters (SPEs). However, significant variability in the emission energies presents a major challenge in producing identical single photons from different 2D SPEs, which may become crucial for practical quantum applications. Although various approaches to dynamically tuning the emission energies of 2D SPEs have been developed to address the issue, the practical solution to matching multiple individual 2D SPEs is still scarce. In this work, we demonstrate precise emission energy tuning of individual SPEs in a WSe monolayer. Our approach utilizes localized strain fields near individual SPEs, which we control by adjusting the volume of a stressor layer through laser annealing. This technique allows continuous emission energy tuning of up to 15 meV while maintaining the qualities of SPEs. Additionally, we showcase the precise spectral alignment of three distinct SPEs in a single WSe monolayer to the same wavelength.
二维（2D）材料已成为下一代集成单光子发射器（SPE）的有前途的候选材料。然而，发射能量的显著变化给从不同的二维单光子发射器产生相同的单光子带来了重大挑战，这对于实际的量子应用可能至关重要。尽管已经开发了各种动态调谐二维单光子发射器发射能量的方法来解决这个问题，但匹配多个单个二维单光子发射器的实际解决方案仍然很少。在这项工作中，我们展示了在WSe单层中对单个单光子发射器进行精确的发射能量调谐。我们的方法利用单个单光子发射器附近的局部应变场，通过激光退火调整应力层的体积来控制该应变场。该技术允许在保持单光子发射器质量的同时，将发射能量连续调谐高达15毫电子伏特。此外，我们展示了在单个WSe单层中三个不同的单光子发射器与相同波长的精确光谱对准。
