Surface Plasmon Enhanced Sensitive Detection for Possible Signature of Majorana Fermions via a Hybrid Semiconductor Quantum Dot-Metal Nanoparticle System.
Surface Plasmon Enhanced Sensitive Detection for Possible Signature of Majorana Fermions via a Hybrid Semiconductor Quantum Dot-Metal Nanoparticle System.
复制标题
通过混合半导体量子点-金属纳米颗粒系统表面等离子体增强敏感检测马约拉纳费米子的可能特征
DOI：
10.1038/srep13518
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发表时间：
2015-08-27
影响因子：
4.6
通讯作者：
Zhu KD
中科院分区：
文献类型：
--
作者：
Chen HJ;Zhu KD
在本工作中，我们从理论上提出了一种通过光学泵浦-探测光谱来探测Majorana费米子可能的特征的光学方案，这与基于电学方法的电流隧穿测量有很大的不同。该方案由金属纳米粒子和半导体量子点耦合到半导体/超导混合异质结中组成。结果表明，由于Majorana费米子的存在，量子点的探测吸收光谱呈现出明显的分裂。由于表面等离子体增强效应，这种分裂将更加明显，这使得马约拉纳费米子更容易被探测到。这里提出的技术为新的应用打开了大门，从对Majorana费米子的稳健操纵到基于Majorana费米子的量子信息处理。
In the present work, we theoretically propose an optical scheme to detect the possible signature of Majorana fermions via the optical pump-probe spectroscopy, which is very different from the current tunneling measurement based on electrical methods. The scheme consists of a metal nanoparticle and a semiconductor quantum dot coupled to a hybrid semiconductor/superconductor heterostructures. The results show that the probe absorption spectrum of the quantum dot presents a distinct splitting due to the existence of Majorana fermions. Owing to surface plasmon enhanced effect, this splitting will be more obvious, which makes Majorana fermions more easy to be detectable. The technique proposed here open the door for new applications ranging from robust manipulation of Majorana fermions to quantum information processing based on Majorana fermions.