Quantum Computing22 Jan 2025 18:58
Joint Manchester Uni/Nanoco paper being presented at Photonics West in SF
https://www.linkedin.com/posts/nanoco-technologies_quantum-computing-communication-and-simulation-activity-7287807855833829377-HRR2
13391-70
Colloidal quantum dots grown from singly-doped seed clusters: a spin-photon interface for quantum memories and quantum repeaters
Author(s): Julian Schneider, Robert Page, James Harris, Nigel Pickett, Nathalie Gresty, Christopher Waby, Charles Biddlecombe, Nanoco Technologies Ltd (United Kingdom); Rachel Barrett, Adam Brookfield, Patrick Parkinson, Floriana Tuna, David J. Binks, The Univ. of Manchester (United Kingdom)
29 January 2025 • 4:10 PM - 4:30 PM PST | Moscone South, Room 158 (Upper Mezz)
Abstract:
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Singly-doped colloidal quantum dots (CQDs) are promising spin-photon interfaces for quantum memories and quantum repeaters; they are substrate-free, benefit from large optical cross-sections, and have a composition and structure that be finely-tuned by well-developed synthetic techniques. However, previously single doping of CQDs could not be deterministically achieved, impacting their viability for quantum technology applications. Here we demonstrate their growth from molecular seed clusters incorporating single Mn atoms and characterise their optical and spin properties. These include a photoluminescence quantum yield of up to 72% and a spin-lattice lifetime of 9.4 ms, the longest yet reported for a doped CQD.