Room-Temperature Inter-Dot Coherent Dynamics in Multilayer Quantum Dot Materials

Elisabetta Collini*, Hugo Gattuso, Yuval Kolodny, Luca Bolzonello, Andrea Volpato, Hanna T. Fridman, Shira Yochelis, Morin Mor, Johanna Dehnel, Efrat Lifshitz, Yossi Paltiel, Raphael D. Levine, Françoise Remacle

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

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.

Original languageAmerican English
Pages (from-to)16222-16231
Number of pages10
JournalJournal of Physical Chemistry C
Volume124
Issue number29
DOIs
StatePublished - 23 Jul 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

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