Polarization-correlated photon pairs from a single quantum dot

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PhysRevB.66.045308.pdf (235.59 KB)

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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.66.045308

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https://doi.org/10.1103/PhysRevB.66.045308
 http://hdl.handle.net/11603/29253

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UMBC Physics Department

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https://orcid.org/0000-0002-6370-8765

Date

2002-07-16

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journal articles
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Citation of Original Publication

Santori, Charles, David Fattal, Matthew Pelton, Glenn S. Solomon, and Yoshihisa Yamamoto. “Polarization-Correlated Photon Pairs from a Single Quantum Dot.” Physical Review B 66, no. 4 (July 16, 2002): 045308. https://doi.org/10.1103/PhysRevB.66.045308.

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©2002 American Physical Society.

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Abstract

Polarization correlation in a linear basis, but not entanglement, is observed between the biexciton and single-exciton photons emitted by a single InAs quantum dot in a two-photon cascade. The results are well described quantitatively by a probabilistic model that includes two decay paths for a biexciton through a nondegenerate pair of one-exciton states, with the polarization of the emitted photons depending on the decay path. The results show that spin nondegeneracy due to quantum-dot asymmetry is a significant obstacle to the realization of an entangled-photon generation device.