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Proceedings Paper

Multiplexed quantum cryptography with single InP quantum dots
Author(s): Thomas Aichele; Valery Zwiller; Matthias Scholz; Gael Reinaudi; Jonas Persson; Oliver Benson
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Paper Abstract

High-efficient single-photon sources are important for fundamental experiments as well as for modern applications in the field of quantum information processing. Therefore, both the overall collection efficiency as well as the photon generation rate are important parameters. In this article, we use cascaded two-photon emission from a single quantum dot in order to double the efficient transmission rate in a quantum key distribution protocol by multiplexing on a single photon level. The energetically non-degenerate photons are separated with a single photon add/drop filter based on a Michelson interferometer. For optimizing the collection efficiency, coupling of quantum emitters to microcavities is advantageous. We also describe preliminary results towards coupling of a single quantum dot grown on a micrometer-sized tip to the whispering gallery modes of a microsphere cavity.

Paper Details

Date Published: 28 April 2005
PDF: 15 pages
Proc. SPIE 5722, Physics and Simulation of Optoelectronic Devices XIII, (28 April 2005);
Show Author Affiliations
Thomas Aichele, Humboldt-Univ. zu Berlin (Germany)
Valery Zwiller, ETH Zuerich (Switzerland)
Matthias Scholz, Humboldt-Univ. zu Berlin (Germany)
Gael Reinaudi, Lab. Kastler Brossel (France)
Jonas Persson, Lund Univ. (Sweden)
Oliver Benson, Humboldt-Univ. zu Berlin (Germany)

Published in SPIE Proceedings Vol. 5722:
Physics and Simulation of Optoelectronic Devices XIII
Marek Osinski; Fritz Henneberger; Hiroshi Amano, Editor(s)

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