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Frontiers in Optics

Efficient and deterministic InAs/GaAs quantum dot single-photon source emitting directly in the original telecommunications band (O-band)

Marcus Albrechtsen, Matéo Vernet, Meng Yu, Nikolai Spitzer, Mikkel T. Mikkelsen, Rodrigo A. Thomas, Andreas Dirk Wieck, Peter Lodahl, Arne Ludwig, Leonardo Midolo

Published Jan 1, 2024• 0 citations
Publisher

Abstract

We demonstrate efficient, pure and on-demand InAs quantum dots in GaAs membranes that emit directly in the telecom O-band (~ 1310nm) with > 1MHz count rates, compatible with existing quantum communication infrastructure.
DOI
10.1364/fio.2024.fm5c.2

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The interference of photons emitted by dissimilar sources is an essential requirement for a wide range of photonic quantum information applications. Many of these applications are in quantum communications and need to operate at standard telecommunication wavelengths to minimize the impact of photon losses and be compatible with existing infrastructure. Here, we demonstrate for the first time the quantum interference of telecom-wavelength photons from an InAs/GaAs quantum dot single-photon source and a laser; an important step towards such applications. The results are in good agreement with a theoretical model, indicating a high degree of indistinguishability for the interfering photons.
The interference of photons emitted by dissimilar sources is an essential requirement for a wide range of photonic quantum information applications. Many of these applications are in quantum communications and need to operate at standard telecommunication wavelengths to minimize the impact of photon losses and be compatible with existing infrastructure. Here, we demonstrate for the first time the quantum interference of telecom-wavelength photons from an InAs/GaAs quantum dot single-photon source and a laser; an important step towards such applications. The results are in good agreement with a theoretical model, indicating a high degree of indistinguishability for the interfering photons.
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