Coherent interaction of three-dimensionally confined electron–hole pairs with LO-phonons

Gindele, F., Reimann, T., Woggon, U., Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023 and Hvam, J. M. 1997. Coherent interaction of three-dimensionally confined electron–hole pairs with LO-phonons. physica status solidi (b) 204 (1) , pp. 42-44. 10.1002/1521-3951(199711)204:1<42::AID-PSSB42>3.0.CO;2-P

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Abstract

The spectrally resolved FWM signal of CdSe quantum dots with sizes below the bulk excitonic Bohr radius has been studied as a function of temperature and excitation intensity and compared with bulk CdSe. A clear oscillation with a period of 163 fs (≈ 25 meV) is found in the transient FWM signal and attributed to a coherent coupling of confined electron–hole pairs with LO-phonons. Two side bands are observed in the spectrum 25 meV below and above the excitonic resonance. The strong coupling to LO-phonons is observed even at excitation densities around 1×1016 cm—3 which is close to the bulk value of the Mott density.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Wiley
ISSN:	1521-3951
Related URLs:	Publisher
Last Modified:	28 Oct 2022 08:47
URI:	https://orca.cardiff.ac.uk/id/eprint/72115

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