Entangled photon pairs from radiative cascades in semiconductor quantum dots

N. Akopian, N. H. Lindner, E. Poem, Y. Berlatzky, J. Avron, D. Gershoni, B. D. Gerardot, P. M. Petroff

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Abstract

Entangled photon pairs are emitted from a biexciton decay cascade of single quantum dots when spectral filtering is applied. We show this by experimentally measuring the density matrix of the polarization state of the photon pair emitted from a continuously pumped quantum dot. The matrix clearly satisfies the Peres criterion for entanglement. By applying in addition a temporal window, the quantum dot becomes an entangled light source. (C) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original languageEnglish
Pages (from-to)3900-3904
Number of pages5
JournalPhysica Status Solidi B - Basic Research
Volume243
Issue number15
Early online date23 Oct 2006
DOIs
Publication statusPublished - Dec 2006

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