Efficient room-temperature molecular single-photon sources for quantum key distribution

Ghulam Murtaza, Maja Colautti*, Michael Hilke, Pietro Lombardi, Francesco Saverio Cataliotti, Alessandro Zavatta, Davide Bacco, Costanza Toninelli

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Quantum key distribution (QKD) allows the distribution of cryptographic keys between multiple users in an information-theoretic secure way, exploiting quantum physics. While current QKD systems are mainly based on attenuated laser pulses, deterministic single-photon sources could give concrete advantages in terms of secret key rate (SKR) and security owing to the negligible probability of multi-photon events. Here, we introduce and demonstrate a proof-of-concept QKD system exploiting a molecule-based single-photon source operating at room temperature and emitting at 785 nm. With an estimated maximum SKR of 0.5 Mbps, our solution paves the way for room-temperature single-photon sources for quantum communication protocols.

Original languageEnglish
JournalOptics Express
Volume31
Issue number6
Pages (from-to)9437-9447
ISSN1094-4087
DOIs
Publication statusPublished - 13 Mar 2023

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