Multi-wave coherent control of a solid-state single emitter
Multi-wave coherent control of a solid-state single emitter
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DOI：
10.1038/nphoton.2016.2
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发表时间：
2016-03-01
期刊：
影响因子：
35
通讯作者：
Kasprzak, J.
中科院分区：
文献类型：
--
作者：
Fras, F.;Mermillod, Q.;Kasprzak, J.
对单个二能级系统的相干控制是任何量子信息协议的核心。在固体(1-6)中，由束缚的电子-空穴激子态产生的二能级系统，囚禁在半导体量子点中，表现出与光的强烈耦合，使得它们能够通过前卫的非线性光谱方法进行光学操纵(7，8)。在这里，我们开发了一个新的工具箱，用于基于光子纳米结构增强的非线性混波响应来相干控制量子点激子。通过使用三个短的共振激光脉冲，我们证明了我们可以随意地操纵量子点偶极子的本征相干性，从而设计出其相干发射的光谱-时间形状。多脉冲量子控制序列已经在核磁共振光谱和量子计算中获得成功，现在可以应用于光学活性固态量子比特，并在高阶非线性光谱、超快量子光电子学和单发射体水平的扩频技术中得到应用。
Coherent control of individual two-level systems is at the heart of any quantum information protocol. In solids(1-6), two-level systems generated by bound electron-hole excitonic states, trapped in semiconductor quantum dots, display a robust coupling with light, enabling their optical manipulation via avant-garde approaches of nonlinear spectroscopy(7,8). Here, we develop a novel toolbox for coherent control of a quantum dot exciton based on the nonlinear wave-mixing responses, which are enhanced by a photonic nanostructure. By employing three, short, resonant laser pulses, we show that we can manipulate, at will, the intrinsic coherence of the quantum dot dipole and therefore engineer the spectro-temporal shape of its coherent emission. Multi-pulse quantum control sequences, which have been successful in NMR spectroscopy and quantum computation(9), can now be applied to optically active solid-state quantum bits with application in high-order nonlinear spectroscopy, ultrafast quantum optoelectronics and spread spectrum technology at the single emitter level.