Mukherjee Sounak, Zhang Zi-Huai, Oblinsky Daniel G, de Vries Mitchell O, Johnson Brett C, Gibson Brant C, Mayes Edwin L H, Edmonds Andrew M, Palmer Nicola, Markham Matthew L, Gali Ádám, Thiering Gergő, Dalis Adam, Dumm Timothy, Scholes Gregory D, Stacey Alastair, Reineck Philipp, de Leon Nathalie P
Department of Electrical and Computer Engineering, Princeton University, Princeton, New Jersey 08544, United States.
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States.
Nano Lett. 2023 Apr 12;23(7):2557-2562. doi: 10.1021/acs.nanolett.2c04608. Epub 2023 Mar 29.
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.
金刚石中的色心是量子技术很有前景的平台。迄今为止发现的金刚石中的大多数色心在可见光或近红外波长范围内发光，这与长距离光纤通信不兼容，并且不利于在生物组织中成像。在此，我们报告了在掺硅块状单晶金刚石和微金刚石中观察到的一种在电信O波段发光的新型色心的实验结果。结合吸收和光致发光测量，我们在1221 nm处识别出一条零声子线以及间隔为42 meV的声子复制品。使用瞬态吸收光谱，我们测量了约270 ps的激发态寿命，并观察到可能由系统间窜越到另一个自旋流形引起的长寿命基线。
