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Nanocavity enhanced photon coherence of solid-state quantum emitters operating up to 30 K

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Version 2 2023-09-27, 09:34
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posted on 2023-09-27, 09:34 authored by Alistair BrashAlistair Brash, Jake Iles-Smith

Data from the manuscript "Nanocavity enhanced photon coherence of solid-state quantum emitters operating up to 30 K".

Abstract:

Solid-state emitters such as epitaxial quantum dots have emerged as a leading platform for efficient, on-demand sources of indistinguishable photons, a key resource for many optical quantum technologies. To maximise performance, these sources normally operate at liquid helium temperatures (~4 K), introducing significant size, weight and power requirements that can be impractical for proposed applications. Here we experimentally resolve the two distinct temperature-dependent phonon interactions that degrade indistinguishability, allowing us to demonstrate that coupling to a photonic nanocavity can greatly improve photon coherence at elevated temperatures compatible with compact cryocoolers. We derive a polaron model that fully captures the temperature-dependent influence of phonons observed in our experiments, providing predictive power to further increase the indistinguishability and operating temperature of future devices through optimised cavity parameters.

Funding

Controlling Environmental Interactions for Novel Solid-State Quantum Technologies

Engineering and Physical Sciences Research Council

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Semiconductor Quantum Photonics: Control of Spin, Exciton and Photon Interactions by Nano-Photonic Design

Engineering and Physical Sciences Research Council

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