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

0561721 - FZÚ 2023 RIV US eng J - Journal Article
Wang, Z. - Hedse, A. - Amarotti, E. - Lenngren, Nils - Žídek, Karel - Zheng, K. - Zigmantas, D. - Pullerits, T.
Beating signals in CdSe quantum dots measured by low-temperature 2D spectroscopy.
Journal of Chemical Physics. Roč. 157, č. 1 (2022), č. článku 014201. ISSN 0021-9606. E-ISSN 1089-7690
R&D Projects: GA MŠMT EF16_019/0000789
Grant - others:OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789
Institutional support: RVO:68378271 ; RVO:61389021
Keywords : ultrafast spectroscopy * 2D spectroscopy * CdSe quantum dots * beating signals
OECD category: Fluids and plasma physics (including surface physics); Optics (including laser optics and quantum optics) (UFP-V)
Impact factor: 4.4, year: 2022
Method of publishing: Limited access
https://doi.org/10.1063/5.0089798

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.
Permanent Link: https://hdl.handle.net/11104/0334379