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Tönu Pullerits. Portrait.

Tönu Pullerits

Professor

Tönu Pullerits. Portrait.

Beating signals in CdSe quantum dots measured by low-temperature 2D spectroscopy

Author

  • Zhengjun Wang
  • Albin Hedse
  • Edoardo Amarotti
  • Nils Lenngren
  • Karel Źídek
  • Kaibo Zheng
  • Donatas Zigmantas
  • Tõnu Pullerits

Summary, in English

Advances in ultrafast spectroscopy can provide access to dynamics involving nontrivial quantum correlations and their evolutions. In coherent 2D spectroscopy, the oscillatory time dependence of a signal is a signature of such quantum dynamics. Here, we study such beating signals in electronic coherent 2D spectroscopy of CdSe quantum dots (CdSe QDs) at 77 K. The beating signals are analyzed in terms of their positive and negative Fourier components. We conclude that the beatings originate from coherent LO-phonons of CdSe QDs. No evidence for the QD size dependence of the LO-phonon frequency was identified.

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience
  • LTH Profile Area: Nanoscience and Semiconductor Technology
  • LTH Profile Area: Photon Science and Technology

Publishing year

2022-07-07

Language

English

Publication/Series

Journal of Chemical Physics

Volume

157

Issue

1

Document type

Journal article

Publisher

American Institute of Physics (AIP)

Topic

  • Atom and Molecular Physics and Optics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0021-9606