Triple nitrogen-vacancy centre fabrication by C5N4Hn ion implantation

Moriyoshi Haruyama, Shinobu Onoda (), Taisei Higuchi, Wataru Kada, Atsuya Chiba, Yoshimi Hirano, Tokuyuki Teraji, Ryuji Igarashi, Sora Kawai, Hiroshi Kawarada, Yu Ishii, Ryosuke Fukuda, Takashi Tanii, Junichi Isoya, Takeshi Ohshima and Osamu Hanaizumi
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Moriyoshi Haruyama: Gunma University
Shinobu Onoda: National Institutes for Quantum and Radiological Science and Technology
Taisei Higuchi: Gunma University
Wataru Kada: Gunma University
Atsuya Chiba: National Institutes for Quantum and Radiological Science and Technology
Yoshimi Hirano: National Institutes for Quantum and Radiological Science and Technology
Tokuyuki Teraji: National Institute for Materials Science
Ryuji Igarashi: National Institutes for Quantum and Radiological Science and Technology
Sora Kawai: Waseda University
Hiroshi Kawarada: Waseda University
Yu Ishii: National Institutes for Quantum and Radiological Science and Technology
Ryosuke Fukuda: National Institutes for Quantum and Radiological Science and Technology
Takashi Tanii: Waseda University
Junichi Isoya: University of Tsukuba
Takeshi Ohshima: National Institutes for Quantum and Radiological Science and Technology
Osamu Hanaizumi: Gunma University

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract Quantum information processing requires quantum registers based on coherently interacting quantum bits. The dipolar couplings between nitrogen vacancy (NV) centres with nanometre separation makes them a potential platform for room-temperature quantum registers. The fabrication of quantum registers that consist of NV centre arrays has not advanced beyond NV pairs for several years. Further scaling up of coupled NV centres by using nitrogen implantation through nanoholes has been hampered because the shortening of the separation distance is limited by the nanohole size and ion straggling. Here, we demonstrate the implantation of C5N4Hn from an adenine ion source to achieve further scaling. Because the C5N4Hn ion may be regarded as an ideal point source, the separation distance is solely determined by straggling. We successfully demonstrate the fabrication of strongly coupled triple NV centres. Our method may be extended to fabricate small quantum registers that can perform quantum information processing at room temperature.

Date: 2019
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DOI: 10.1038/s41467-019-10529-x

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