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

Gindele, F., Reimann, T., Woggon, U., Langbein, Wolfgang Werner 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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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: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Wiley
ISSN: 1521-3951
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Last Modified: 04 Jun 2017 08:02

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