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Breakthrough in Quantum Tech: Researchers Track Dark Excitons

9/28/2025

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Summary

Story summary

Researchers at Okinawa Institute of Science and Technology (OIST) tracked dark excitons in atomically thin materials, advancing quantum information technologies.
They identify two types—momentum-dark and spin-dark—that can persist for nanoseconds.
A TR-ARPES system allowed monitoring of exciton evolution, measuring momentum and spin.
Work builds on a 2020 valleytronics breakthrough and is published in Nature Communications with Japanese support.

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Story summary

Researchers at Okinawa Institute of Science and Technology (OIST) tracked dark excitons in atomically thin materials, advancing quantum information technologies.
They identify two types—momentum-dark and spin-dark—that can persist for nanoseconds.
A TR-ARPES system allowed monitoring of exciton evolution, measuring momentum and spin.
Work builds on a 2020 valleytronics breakthrough and is published in Nature Communications with Japanese support.