An efficient quantum photonic phase shift in a low Q-factor regime

Petros Androvitsaneas; Andrew Young; Joseph Lennon; Christian Schneider; Sebastian Maier; Janna Hinchliff; George Atkinson; Edmund Harbord; Martin Kamp; Sven Höfling; John G. Rarity; Ruth Oulton

doi:10.1021/acsphotonics.8b01380

An efficient quantum photonic phase shift in a low Q-factor regime

Petros Androvitsaneas, Andrew Young, Joseph Lennon, Christian Schneider, Sebastian Maier, Janna Hinchliff, George Atkinson, Edmund Harbord, Martin Kamp, Sven Höfling, John G. Rarity, Ruth Oulton

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Abstract

Solid-state quantum emitters have long been recognised as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarisation switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.

Original language	English
Pages (from-to)	429-435
Journal	ACS Photonics
Volume	6
Issue number	2
Early online date	11 Jan 2019
DOIs	https://doi.org/10.1021/acsphotonics.8b01380
Publication status	Published - 20 Feb 2019

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Androvitsaneas_2019_ACSPhotonics_Q-factor_AAM
Copyright © 2019 American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at 10.1021/acsphotonics.8b01380
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title = "An efficient quantum photonic phase shift in a low Q-factor regime",

abstract = "Solid-state quantum emitters have long been recognised as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarisation switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.",

author = "Petros Androvitsaneas and Andrew Young and Joseph Lennon and Christian Schneider and Sebastian Maier and Janna Hinchliff and George Atkinson and Edmund Harbord and Martin Kamp and Sven H{\"o}fling and Rarity, {John G.} and Ruth Oulton",

note = "This work was funded by the Future Emerging Technologies (FET)-Open FP7-284743 [project Spin Photon Angular Momentum Transfer for Quantum Enabled Technologies (SPANGL4Q)] and the German Ministry of Education and research (BMBF) and Engineering and Physical Sciences Research Council (EPSRC) (EP/M024156/1, EP/N003381/1 and EP/M024458/1). J.J.H. was supported by the Bristol Quantum Engineering Centre for Doctoral Training, EPSRC grant EP/L015730/1. We acknowledge the GW4 network for funding of A.Y.",

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AU - Androvitsaneas, Petros

AU - Young, Andrew

AU - Lennon, Joseph

AU - Schneider, Christian

AU - Maier, Sebastian

AU - Hinchliff, Janna

AU - Atkinson, George

AU - Harbord, Edmund

AU - Kamp, Martin

AU - Höfling, Sven

AU - Rarity, John G.

AU - Oulton, Ruth

N1 - This work was funded by the Future Emerging Technologies (FET)-Open FP7-284743 [project Spin Photon Angular Momentum Transfer for Quantum Enabled Technologies (SPANGL4Q)] and the German Ministry of Education and research (BMBF) and Engineering and Physical Sciences Research Council (EPSRC) (EP/M024156/1, EP/N003381/1 and EP/M024458/1). J.J.H. was supported by the Bristol Quantum Engineering Centre for Doctoral Training, EPSRC grant EP/L015730/1. We acknowledge the GW4 network for funding of A.Y.

PY - 2019/2/20

Y1 - 2019/2/20

N2 - Solid-state quantum emitters have long been recognised as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarisation switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.

AB - Solid-state quantum emitters have long been recognised as the ideal platform to realize integrated quantum photonic technologies. We demonstrate that a self-assembled negatively charged quantum dot (QD) in a low Q-factor photonic micropillar is a suitable design for deterministic polarisation switching and spin-photon entanglement. We show this by measuring a shift in phase of an input single photon of at least 2π/3. As we explain in the text, this is strong experimental proof that input photons can interact with the emitter deterministically. A deterministic photon-emitter interaction is a viable and scalable means to achieve several vital functionalities such as single photon switches and entanglement gates. Our experimentally determined value is limited by mode mismatch between the input laser and the cavity, QD spectral fluctuations and spin relaxation. When on-resonance we estimate that up to ∼80% of the collected photons couple into the cavity mode and have interacted with the QD and undergone a phase shift of π.

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An efficient quantum photonic phase shift in a low Q-factor regime

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