1Key Lab of Quantum Information, Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230026 2Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026 3Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 4University of Chinese Academy of Sciences, Beijing 100049
Abstract：Single-photon flux is one of the crucial properties of nitrogen vacancy (NV) centers in diamond for its application in quantum information techniques. Here we fabricate diamond conical nanowires to enhance the single-photon count rate. Through the interaction between tightly confined optical mode in nanowires and NV centers, the single-photon lifetime is much shortened and the collection efficiency is enhanced. As a result, the detected single-photon rate can be at 564 kcps, and the total detection coefficient can be 0.8%, which is much higher than that in bulk diamond. Such a nanowire single-photon device with high photon flux can be applied to improve the fidelity of quantum computation and the precision of quantum sensors.
Mizuochi N, Makino T, Kato H, Takeuchi D, Ogura M, Okushi H, Nothaft M, Neumann P, Gali A, Jelezko F, Wrachtrup J and Yamasaki S 2012 Nat. Photon.6 299
[5]
Waldherr G, Wang Y, Zaiser S, Jamali M, Schulte-Herbrüggen T, Abe H, Ohshima T, Isoya J, Du J F, Neumann P and Wrachtrup J 2014 Nature506 204
[6]
Maze J R, Stanwix P L, Hodges J S, Hong S, Taylor J M, Cappellaro P, Jiang L, Dutt M V G, Togan E, Zibrov A S, Yacoby A, Walsworth R L and Lukin M D 2008 Nature455 644
Kucsko G, Maurer P C, Yao N Y, Kubo M, Noh H J, Lo P K, Park H and Lukin M D 2013 Nature500 54
[10]
Arcizet O, Jacques V, Siria A, Poncharal P, Vincent P and Seidelin S 2011 Nat. Phys.7 879
[11]
Doherty M W, Struzhkin V V, Simpson D A, McGuinness L P, Meng Y, Stacey A, Karle T J, Hemley R J, Manson N B, Hollenberg L C L and Prawer S 2014 Phys. Rev. Lett.112 047601
Hall L T, Beart G C G, Thomas E A, Simpson D A, McGuinness L P, Cole J H, Manton J H, Scholten R E, Jelezko F, Wrachtrup J, Petrou S and Hollenberg L C L 2012 Sci. Rep.2 401
2017, Vol. 34 
