Heterogeneous integration for on-chip quantum photonic circuits with single quantum dot devices

Marcelo Davanco (), Jin Liu (), Luca Sapienza, Chen-Zhao Zhang, José Vinícius Miranda Cardoso, Varun Verma, Richard Mirin, Sae Woo Nam, Liu Liu and Kartik Srinivasan ()
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Marcelo Davanco: National Institute of Standards and Technology
Jin Liu: National Institute of Standards and Technology
Luca Sapienza: National Institute of Standards and Technology
Chen-Zhao Zhang: South China Normal University, Higher-Education Mega-Center
José Vinícius Miranda Cardoso: National Institute of Standards and Technology
Varun Verma: National Institute of Standards and Technology
Richard Mirin: National Institute of Standards and Technology
Sae Woo Nam: National Institute of Standards and Technology
Liu Liu: South China Normal University, Higher-Education Mega-Center
Kartik Srinivasan: National Institute of Standards and Technology

Nature Communications, 2017, vol. 8, issue 1, 1-12

Abstract: Abstract Single-quantum emitters are an important resource for photonic quantum technologies, constituting building blocks for single-photon sources, stationary qubits, and deterministic quantum gates. Robust implementation of such functions is achieved through systems that provide both strong light–matter interactions and a low-loss interface between emitters and optical fields. Existing platforms providing such functionality at the single-node level present steep scalability challenges. Here, we develop a heterogeneous photonic integration platform that provides such capabilities in a scalable on-chip implementation, allowing direct integration of GaAs waveguides and cavities containing self-assembled InAs/GaAs quantum dots—a mature class of solid-state quantum emitter—with low-loss Si3N4 waveguides. We demonstrate a highly efficient optical interface between Si3N4 waveguides and single-quantum dots in GaAs geometries, with performance approaching that of devices optimized for each material individually. This includes quantum dot radiative rate enhancement in microcavities, and a path for reaching the non-perturbative strong-coupling regime.

Date: 2017
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DOI: 10.1038/s41467-017-00987-6

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