Ultrafast Coherent Delocalization Revealed in Multilayer QDs under a Chiral Potential

Hanna T. Fridman, Hadar Manis Levy, Amitai Meir, Andrea Casotto, Rotem Malkinson, Joanna Dehnel, Shira Yochelis, Efrat Lifshitz, Nir Bar-Gill, Elisabetta Collini, Yossi Paltiel*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In recent years, it was found that current passing through chiral molecules exhibits spin preference, an effect known as Chiral Induced Spin Selectivity (CISS). The effect also enables the reduction of scattering and therefore enhances delocalization. As a result, the delocalization of an exciton generated in the dots is not symmetric and relates to the electronic and hole excited spins. In this work utilizing fast spectroscopy on hybrid multilayered QDs with a chiral polypeptide linker system, we probed the interdot chiral coupling on a short time scale. Surprisingly, we found strong coherent coupling and delocalization despite having long 4-nm chiral linkers. We ascribe the results to asymmetric delocalization that is controlled by the electron spin. The effect is not measured when using shorter nonchiral linkers. As the system mimics light-harvesting antennas, the results may shed light on a mechanism of fast and efficient energy transfer in these systems.

Original languageAmerican English
Pages (from-to)2234-2240
Number of pages7
JournalJournal of Physical Chemistry Letters
Volume14
Issue number8
DOIs
StatePublished - 2 Mar 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

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