Title: Effects of exciton–biexciton coherent coupling on exciton absorption in quantum dots
Abstract: We report unusual excitonic absorption spectra with dip-shaped structures caused by exciton–biexciton coherent interactions in quantum dots. The exciton absorption spectrum is measured with the micro-photoluminescence excitation technique in a single InGaAs quantum dot. The spectrum changes from Lorenztian-shaped to dip-shaped with increasing excitation intensity. A theoretical analysis with the density matrix method reveals that exciton–biexciton coherent interactions create dressed states in the exciton–biexciton system and lead to the unusual absorption spectra.
Publication Year: 2004
Publication Date: 2004-10-18
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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