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Proceedings Paper

Putting the spin in photonic crystal waveguides (Conference Presentation)
Author(s): Andrew B. Young; Ben Lang; Arthur C. T. Thijssen; Daryl M. Beggs; Laurens Kuipers; John G. Rarity; Stephen Hughes; Ruth Oulton
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Paper Abstract

By performing a full analysis of the projected local density of states (LDOS) in a photonic crystal waveguide, we show that phase plays a crucial role in the symmetry of the light-matter interaction. By considering a quantum dot (QD) spin coupled to a photonic crystal waveguide (PCW) mode, we demonstrate that the light-matter interaction can be asymmetric, leading to unidirectional emission and a deterministic entangled photon source. Further we show that understanding the phase associated with both the LDOS and the QD spin is essential for a range of devices that can be realized with a QD in a PCW. We also show how suppression of quantum interference prevents dipole induced reflection in the waveguide, and highlight a fundamental breakdown of the semiclassical dipole approximation for describing light-matter interactions in these spin dependent systems.

Paper Details

Date Published: 9 November 2016
PDF: 1 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 992011 (9 November 2016); doi: 10.1117/12.2235864
Show Author Affiliations
Andrew B. Young, Univ. of Bristol (United Kingdom)
Ben Lang, Univ. of Bristol (United Kingdom)
Arthur C. T. Thijssen, Univ. of Bristol (United Kingdom)
Daryl M. Beggs, Univ. of Bristol (United Kingdom)
Laurens Kuipers, FOM Institute for Atomic and Molecular Physics (Netherlands)
John G. Rarity, Univ. of Bristol (United Kingdom)
Stephen Hughes, Queen's Univ. (Canada)
Ruth Oulton, Univ. of Bristol (United Kingdom)

Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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