High-Efficiency Single Photon Emission from a Silicon T-Center in a Nanobeam

by Fariba Islam

March 1, 2024 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility;

Advisor: Professor Edo Waks

Silicon color centers, particularly the T center, offer potential as efficient quantum emitters and long-lived quantum memory in all-silicon systems. However, the T center's extended excited state lifetime hinders photon emission rates. In our study, we demonstrate high-efficiency single photon emission from a T center using a nanobeam. The nanobeam aligns well with a lensed fiber, enabling us to capture over 70% of the emission directly into a single-mode fiber, including emission from the zero-phonon line. This represents a crucial step toward silicon-based spin-photon interfaces for quantum computing and networks.

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