Composed Effects of Electron-Hole Exchange and Near-Field Interaction in Quantum-Dot-Confined Radiative Dipoles

IF 1.9 Q3 PHYSICS, CONDENSED MATTER
Jaime David Díaz-Ramírez, Shiang-Yu Huang, Bo-Long Cheng, Ping-Yuan Lo, Shun-Jen Cheng, Hanz Yecid Ramírez-Gómez
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引用次数: 1

Abstract

Conservation of polarization is an important requirement for reliable single-photon emitters, which, in turn, are essential building blocks for light-based quantum information processing. In this work, we study the exciton-spin dynamics in a double quantum dot under the combined effects of electron-hole exchange and Förster resonance energy transfer. By means of numerical solutions of the quantum master equation, we simulate the time-dependent spin polarization for two neighboring dots. According to our results, under some conditions, the depolarization caused by the electron-hole exchange may be slowed by the near field-induced interdot energy transfer, suggesting a new mechanism to extend the exciton coherence time. This opens doors to alternative schemes for improved solid-state quantum light sources.
量子点限制辐射偶极子中电子-空穴交换和近场相互作用的复合效应
偏振守恒是可靠的单光子发射器的重要要求,而单光子发射器又是基于光的量子信息处理的基本组成部分。本文研究了电子-空穴交换和Förster共振能量转移共同作用下双量子点的激子-自旋动力学。利用量子主方程的数值解,我们模拟了两个相邻点的随时间变化的自旋极化。根据我们的研究结果,在某些条件下,由电子-空穴交换引起的去极化可能会被近场诱导的点间能量转移所减缓,这表明了一种延长激子相干时间的新机制。这为改进固态量子光源的替代方案打开了大门。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Condensed Matter
Condensed Matter PHYSICS, CONDENSED MATTER-
CiteScore
2.90
自引率
11.80%
发文量
58
审稿时长
10 weeks
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