4.8 Article

A Telecom O-Band Emitter in Diamond

期刊

NANO LETTERS
卷 23, 期 7, 页码 2557-2562

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c04608

关键词

telecom emitter; O-band; color center; diamond; optical spectroscopy

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Color centers in diamond have potential applications in quantum technologies. We discovered a new color center in silicon-doped diamond that emits in the telecom O-band, which is compatible with long-distance fiber communication. The color center exhibits a long excited state lifetime and a possible intersystem crossing to another spin manifold.
Color centers in diamond are promising platforms for quantum technologies. Most color centers in diamond discovered thus far emit in the visible or near-infrared wavelength range, which are incompatible with long-distance fiber communication and unfavorable for imaging in biological tissues. Here, we report the experimental observation of a new color center that emits in the telecom O-band, which we observe in silicon-doped bulk single crystal diamonds and microdiamonds. Combining absorption and photoluminescence measurements, we identify a zero-phonon line at 1221 nm and phonon replicas separated by 42 meV. Using transient absorption spectroscopy, we measure an excited state lifetime of around 270 ps and observe a long-lived baseline that may arise from intersystem crossing to another spin manifold.

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