A Telecom O-Band Emitter in Diamond
Sounak Mukherjee, Zi-Huai Zhang, Daniel G. Oblinsky, M. de Vries, Brett C. Johnson, Brant C. Gibson, Edwin Mayes, Andrew M. Edmonds, Nicola Palmer, Matthew Markham, Ádám Gali, Gergő Thiering, Adam Dalis, Timothy Dumm, Gregory D. Scholes, Alastair Stacey, Philipp Reineck, Nathalie P. de Leon
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 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.