arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2409.04749cond-mat.mtrl-sciphysics.app-ph
收藏

WSe2/CrSBr异质结中来自本征局域激子的高偏振单光子发射体

Highly polarized single photon emitter from intrinsic localized excitons in a WSe2/CrSBr heterostructure

Varghese Alapatt, Francisco Marques-Moros, Carla Boix-Constant, Samuel Manas-Valero, Kirill Bolotin, Josep Canet-Ferrer, Eugenio Coronado

AI总结:

本研究提出WSe2/CrSBr二维半导体-磁体异质结方案,利用磁邻近效应产生高偏振、可被面内及面外磁场调控的局域激子单光子发射体。

摘要:

单光子发射体(SPE)是量子信息应用中的关键组件,通常在二维材料中通过非均匀应变工程产生。在此,我们报道了一种涉及二维半导体/二维磁体异质结的替代方法。对WSe2/CrSBr异质结的光学研究揭示,与WSe2的特征发射相比,在较低能量处出现了若干新的发射谱线,这些谱线被归属于局域激子。进一步研究表明,这些新生谱线之一是具有强谷偏振响应的SPE,并随CrSBr中场诱导的变磁转变产生较大的能量移动,这将其与相邻CrSBr层的磁邻近效应联系起来。与以往关于WSe2的报道仅允许通过面外磁场调节SPE不同,我们的发射体对面内和面外磁场均敏感。我们的研究结果证明了该方法在改进二维材料中SPE的控制和偏振方面的潜力。

英文摘要:

Single photons emitters (SPEs) are key components in quantum information applications and are commonly generated in 2D materials by inhomogeneous strain engineering. Here, we report an alternative approach that involves a 2D semiconductor/2D magnet heterostructure. The optical study of the WSe2/CrSBr heterostructures reveals several new emission lines at lower energies compared to characteristic WSe2 emissions, that are assigned to localized excitons. Further investigation demonstrates that one of these emergent lines is an SPE with a strong valley polarization response and large energy shift with the field-induced metamagnetic transition in CrSBr, linking it to the magnetic proximity effect of the adjacent CrSBr layer. In contrast to previous reports on WSe2 that only allow tuning of the SPEs by out-of-plane magnetic field, our emitter is sensitive to both in- and out-of-plane fields. Our findings demonstrate the potential of this approach for improved control and polarization of SPEs in 2D materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑