A Telecom O-Band Emitter in Diamond

Mukherjee, Sounak and Zhang, Zi-Huai and Oblinsky, Daniel G. and de Vries, Mitchell O. and Johnson, Brett C. and Gali, Ádám and Thiering, Gergő (2023) A Telecom O-Band Emitter in Diamond. NANO LETTERS, 23 (7). pp. 2557-2562. ISSN 1530-6984

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Abstract

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 communi- cation 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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