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arXiv 2103.01731physics.opticscond-mat.mtrl-sci
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介质微谐振器回音壁模揭示单层WSe2中三电子的面外发射

Out-of-plane emission of trions in monolayer WSe2 revealed by whispering gallery modes of dielectric microresonators

D. Andres-Penares, M. K. Habil, A. Molina-Sánchez, C. J. Zapata-Rodríguez, J. P. Martínez-Pastor, J. F. Sánchez-Royo

摘要:

对二维半导体发出的光的操纵为片上通信领域即将到来的技术奠定了基础。然而,这些技术需要如此难以捉摸的平面外光子源来实现辐射光到平面器件中的有效耦合。在这里,我们提出了一个通用的光谱方法,使识别的偶极子的面外分量。该方法是基于选择性耦合的平面内和平面外的偶极子发出的光的回音壁模式的球形介质微谐振器,在密切接触他们。我们已经应用这种方法来证明在室温下单层WSe 2中存在具有面外取向的偶极子。微观光致发光测量,基于有限元方法的数值模拟和从头计算已经确定了trions作为负责这种面外发射的源,为实现在信息处理和量子通信中应用的片上集成系统开辟了新的途径。

英文摘要:

The manipulation of light emitted by two-dimensional semiconductors grounds forthcoming technologies in the field of on-chip communications. However, these technologies require from the so elusive out-of-plane photon sources to achieve an efficient coupling of radiated light into planar devices. Here we propose a versatile spectroscopic method that enables the identification of the out-of-plane component of dipoles. The method is based on the selective coupling of light emitted by in-plane and out-of-plane dipoles to the whispering gallery modes of spherical dielectric microresonators, in close contact to them. We have applied this method to demonstrate the existence of dipoles with an out-of-plane orientation in monolayer WSe2 at room temperature. Micro-photoluminescent measurements, numerical simulations based on finite element methods, and ab-initio calculations have identified trions as the source responsible for this out-of-plane emission, opening new routes for realizing on-chip integrated systems with applications in information processing and quantum communications.

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。

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