Artistic depiction of a single erbium ion being implanted into a silicon-based optical nanocavity. A focused ion beam (top) delivers individual erbium ions with nanometer precision, while a laser (left) laterally couples light into the nanocavity to excite the ion. The excited erbium ion emits single photons in the telecom C-band, enabling scalable quantum light sources compatible with existing fiber networks. Source: B. Schröder/HZDR
From single photons to storage: EQUAL aims to integrate quantum light sources with quantum memories. Danish-German collaboration seeks to develop technology for scalable quantum networks based on erbium.
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▶️https://www.hzdr.de/presse/project_equal
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