Polarization Engineering in Photonic Crystal Waveguides for Spin-Photon Entanglers
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 demons...
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| Veröffentlicht in: | Physical review letters 2015-10, Vol.115 (15), p.153901-153901, Article 153901 |
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| container_title | Physical review letters |
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| creator | Young, A B Thijssen, A C T Beggs, D M Androvitsaneas, P Kuipers, L Rarity, J G Hughes, S Oulton, R |
| description | 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. |
| doi_str_mv | 10.1103/PhysRevLett.115.153901 |
| format | Article |
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| ispartof | Physical review letters, 2015-10, Vol.115 (15), p.153901-153901, Article 153901 |
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| language | eng |
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| source | American Physical Society Journals |
| subjects | Devices Dipoles Photonic crystals Photons Pollution sources Quantum dots Reflection Waveguides |
| title | Polarization Engineering in Photonic Crystal Waveguides for Spin-Photon Entanglers |
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