Design of bull’s eye structures on gate-defined lateral quantum dots
Design of bull’s eye structures on gate-defined lateral quantum dots
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DOI：
10.7567/jjap.56.04ck04
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发表时间：
2016-09
影响因子：
1.5
通讯作者：
Rio Fukai;T. Nakagawa;H. Kiyama;A. Oiwa
中科院分区：
文献类型：
--
作者：
Rio Fukai;T. Nakagawa;H. Kiyama;A. Oiwa
实现远距离量子通信需要量子中继器。量子中继器由存储量子信息的量子存储器和光子飞行量子比特与存储量子比特之间的接口组成。门定义量子点（QDs）中的电子自旋具有相对较长的相干时间和较高的电可调性，由于探测和操纵单个光电子自旋的基本技术已经建立，因此有望成为这种存储量子比特的候选者。实现量子中继器的剩余挑战是量子点中光子和电子自旋之间的有效耦合。本文在电磁场模拟的基础上，讨论了门定义量子点上的入射光通过牛眼结构增强透射和维持偏振的问题。
Quantum repeaters are required for realizing long-distance quantum communication. The quantum repeater consists of a quantum memory to store quantum information and an interface between photonic flying qubits and the memory qubits. Electron spins in gate-defined quantum dots (QDs), which have a relatively long coherence time and high electrical tunability, are promising candidates for such memory qubits because the fundamental technologies of detecting and manipulating single photoelectron spins have been established. The remaining challenge for the realization of quantum repeaters is an efficient coupling between photons and electron spins in the QDs. In this study, we discuss the enhancement of the transmission and the maintenance of the incident light polarization through bull’s eye structures on gate-defined QDs on the basis of electromagnetic field simulations.