Cavity enhanced emission from a silicon T center

• URL: http://arxiv.org/abs/2310.13808v2
• Date: Wed, 25 Oct 2023 15:27:32 GMT
• Title: Cavity enhanced emission from a silicon T center
• Authors: Fariba Islam, Chang-Min Lee, Samuel Harper, Mohammad Habibur Rahaman, Yuqi Zhao, Neelesh Kumar Vij, and Edo Waks
• Abstract summary: T centers exhibit long excited state lifetimes and a low Debye-Waller factor, making them dim emitters with low efficiency into the zero-phonon line. Nanophotonic cavities can solve this problem by enhancing radiative emission into the zero-phonon line through the Purcell effect.
• Score: 0.23917125666169287
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Silicon T centers present the promising possibility to generate optically active spin qubits in an all-silicon device. However, these color centers exhibit long excited state lifetimes and a low Debye-Waller factor, making them dim emitters with low efficiency into the zero-phonon line. Nanophotonic cavities can solve this problem by enhancing radiative emission into the zero-phonon line through the Purcell effect. In this work we demonstrate cavity-enhanced emission from a single T center in a nanophotonic cavity. We achieve a two-orders of magnitude increase in brightness of the zero-phonon line relative to waveguide-coupled emitters, a 23% collection efficiency from emitter to fiber, and an overall emission efficiency into the zero-phonon line of 63.4%. We also observe a lifetime enhancement of 5, corresponding to a Purcell factor exceeding 18 when correcting for the emission to the phonon sideband. These results pave the way towards efficient spin-photon interfaces in silicon photonics.

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