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Researchers at TUM and MCQST have developed photonic crystal waveguides that significantly improve single-photon source efficiency by actively suppressing unwanted frequencies rather than relying on narrow-band resonators. This approach achieves a 72% yield of desired photons compared to previous methods, offering greater flexibility for integrating multiple sources into existing fiber-optic infrastructure without precise tuning.

Source coveringQuantum Zeitgeist

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MCQST photonic waveguides filter light for quantum communication

Quantum ZeitgeistAugust 18, 20263 min read

Researchers at TUM & MCQST created single-photon sources using nanostructures—specifically, photonic crystal waveguides—that block unwanted frequencies, improving quantum communication efficiency.

Researchers at the Technical University of Munich (TUM) and the Munich Center for Quantum Science and Technology (MCQST) are pursuing a more scalable method for generating single photons crucial to quantum communication by suppressing unwanted light frequencies. Unlike previous technologies relying on precisely tuned resonators, the team utilizes photonic crystal waveguides, nanostructures that…

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