Tech Optimizer
August 9, 2025
A team from Kyoto University has developed a light source that emits single photons, enhanced in brightness by a small magnetic field, which can be used for secure quantum communications. This technology relies on the principles of quantum mechanics, making it difficult for eavesdroppers to replicate or measure the quantum states without detection. The researchers used a one-atom-thick semiconductor sheet, WSe₂, creating traps for excitons that emit photons when relaxed. Current limitations include the need for cryogenic temperatures for operation, but advancements in materials may allow for room-temperature single-photon emission. The technology has potential applications in secure communications for sensitive transactions and could evolve into compact modules for practical use. Recent studies have demonstrated successful quantum key distribution (QKD) using true single-photon sources, indicating progress in integrating quantum technology into real-world networking.
