Room-Temperature Inter-Dot Coherent Dynamics in Multilayer Quantum Dot Materials,The Journal of Physical Chemistry C

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Room-Temperature Inter-Dot Coherent Dynamics in Multilayer Quantum Dot Materials
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-06-25 , DOI: 10.1021/acs.jpcc.0c05572
Elisabetta Collini ₁ , Hugo Gattuso ₂ , Yuval Kolodny ₃ , Luca Bolzonello ₁ , Andrea Volpato ₁ , Hanna T. Fridman ₃ , Shira Yochelis ₃ , Morin Mor ₄ , Johanna Dehnel ₄ , Efrat Lifshitz ₄ , Yossi Paltiel ₃ , Raphael D. Levine ₅ , Françoise Remacle _{2,

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Affiliation

The full blossoming of quantum technologies requires the availability of easy-to-prepare materials where quantum coherences can be effectively initiated, controlled, and exploited, preferably at ambient conditions. Solid-state multilayers of colloidally grown quantum dots (QDs) are highly promising for this task because of the possibility of assembling networks of electronically coupled QDs through the modulation of sizes, inter-dot linkers, and distances. To usefully probe coherence in these materials, the dynamical characterization of their collective quantum mechanically coupled states is needed. Here, we explore by two-dimensional electronic spectroscopy the coherent dynamics of solid-state multilayers of electronically coupled colloidally grown CdSe QDs and complement it by detailed computations. The time evolution of a coherent superposition of states delocalized over more than one QD was captured at ambient conditions. We thus provide important evidence for inter-dot coherences in such solid-state materials, opening up new avenues for the effective application of these materials in quantum technologies.

中文翻译：

多层量子点材料的室温点间相干动力学

量子技术的全面发展需要易于制备的材料的可用性，在这些材料中，最好在环境条件下可以有效地引发，控制和利用量子相干性。胶体生长量子点（QD）的固态多层非常有希望实现该任务，因为可以通过大小，点间连接子和距离的调制来组装电子耦合QD的网络。为了有效地探测这些材料中的相干性，需要对其集体量子机械耦合态进行动态表征。在这里，我们通过二维电子光谱探索电子耦合的胶体生长的CdSe QD固态多层的相干动力学，并通过详细的计算对其进行补充。在环境条件下捕获了一个以上的量子点离域态的相干叠加态的时间演化。因此，我们为此类固态材料中的点间相干提供了重要证据，为在量子技术中有效应用这些材料开辟了新途径。

更新日期：2020-07-23

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