High-efficiency single photon emission from a silicon T-center in a nanobeam

• URL: http://arxiv.org/abs/2308.04541v1
• Date: Tue, 8 Aug 2023 19:17:24 GMT
• Title: High-efficiency single photon emission from a silicon T-center in a nanobeam
• Authors: Chang-Min Lee, Fariba Islam, Samuel Harper, Mustafa Atabey Buyukkaya, Daniel Higginbottom, Stephanie Simmons, Edo Waks
• Abstract summary: Color centers in Si could serve as both efficient quantum emitters and quantum memories with long coherence times. We demonstrate high-efficiency single photon emission from a single T center using a nanobeam.
• Score: 0.7656045817750738
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Color centers in Si could serve as both efficient quantum emitters and quantum memories with long coherence times in an all-silicon platform. Of the various known color centers, the T center holds particular promise because it possesses a spin ground state that has long coherence times. But this color center exhibits a long excited state lifetime which results in a low photon emission rate, requiring methods to extract photon emission with high efficiency. We demonstrate high-efficiency single photon emission from a single T center using a nanobeam. The nanobeam efficiently radiates light in a mode that is well-matched to a lensed fiber, enabling us to collect over 70% of the T center emission directly into a single mode fiber. This efficiency enables us to directly demonstrate single photon emission from the zero phonon line, which represents the coherent emission from the T center. Our results represent an important step towards silicon-integrated spin-photon interfaces for quantum computing and quantum networks.

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