Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

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

Wang, Zhengjun LU ; Hedse, Albin LU ; Amarotti, Edoardo LU ; Lenngren, Nils LU ; Źídek, Karel LU ; Zheng, Kaibo LU ; Zigmantas, Donatas LU orcid and Pullerits, Tõnu LU (2022) In Journal of Chemical Physics 157(1).
Abstract

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.

Please use this url to cite or link to this publication:
author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Chemical Physics
volume
157
issue
1
article number
014201
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85133665156
  • pmid:35803814
ISSN
0021-9606
DOI
10.1063/5.0089798
language
English
LU publication?
yes
id
9b44a99b-de06-4d0d-bc8f-9f2b2fe0309c
date added to LUP
2022-09-23 13:45:20
date last changed
2024-04-15 19:22:00
@article{9b44a99b-de06-4d0d-bc8f-9f2b2fe0309c,
  abstract     = {{<p>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.</p>}},
  author       = {{Wang, Zhengjun and Hedse, Albin and Amarotti, Edoardo and Lenngren, Nils and Źídek, Karel and Zheng, Kaibo and Zigmantas, Donatas and Pullerits, Tõnu}},
  issn         = {{0021-9606}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{1}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Journal of Chemical Physics}},
  title        = {{Beating signals in CdSe quantum dots measured by low-temperature 2D spectroscopy}},
  url          = {{http://dx.doi.org/10.1063/5.0089798}},
  doi          = {{10.1063/5.0089798}},
  volume       = {{157}},
  year         = {{2022}},
}