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Electrically driven single-photon source at room temperature in diamond


Single-photon sources that provide non-classical light states on demand have a broad range of applications in quantum communication, quantum computing and metrology1. Single-photon emission has been demonstrated using single atoms2, ions3, molecules4, diamond colour centres5,6 and semiconductor quantum dots7,8,9,10,11. Significant progress in highly efficient8,11 and entangled photons9 sources has recently been shown in semiconductor quantum dots; however, the requirement of cryogenic temperatures due to the necessity to confine carriers is a major obstacle. Here, we show the realization of a stable, room-temperature, electrically driven single-photon source based on a single neutral nitrogen-vacancy centre in a novel diamond diode structure. Remarkably, the generation of electroluminescence follows kinetics fundamentally different from that of photoluminescence with intra-bandgap excitation. This suggests electroluminescence is generated by electron–hole recombination at the defect. Our results prove that functional single defects can be integrated into electronic control structures, which is a crucial step towards elaborate quantum information devices.

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Figure 1: NV centre in diamond and device.
Figure 2: Microscopy images and spectra.
Figure 3: Antibunching and lifetime of NV0.
Figure 4: Kinetics of electroluminescence.

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  1. Santori, C., Fattal, D. & Yamamoto, Y. Single-Photon Devices and Applications (Wiley, 2010).

  2. Kuhn, A., Hennrich, M. & Rempe, G. Deterministic single-photon source for distributed quantum networking. Phys. Rev. Lett. 89, 067901 (2002).

    Article  ADS  Google Scholar 

  3. Keller, M., Lange, B., Hayasaka, K., Lange, W. & Walther, H. Continuous generation of single photons with controlled waveform in an ion-trap cavity system. Nature 431, 1075–1078 (2004).

    Article  ADS  Google Scholar 

  4. Lounis, B. & Moerner, W. E. Single photons on demand from a single molecule at room temperature. Nature 407, 491–493 (2000).

    Article  ADS  Google Scholar 

  5. Kurtsiefer, C., Mayer, S., Zarda, P. & Weinfurter, H. Stable solid-state source of single photons. Phys. Rev. Lett. 85, 290–293 (2000).

    Article  ADS  Google Scholar 

  6. Aharonovich, I. et al. Diamond-based single-photon emitters. Rep. Prog. Phys. 74, 076501 (2011).

    Article  ADS  Google Scholar 

  7. Michler, P. et al. A quantum dot single-photon turnstile device. Science 290, 2282–2285 (2000).

    Article  ADS  Google Scholar 

  8. Yuan, Z. et al. Electrically driven single-photon source. Science 295, 102–105 (2002).

    Article  ADS  Google Scholar 

  9. Salter, C. L. et al. An entangled-light-emitting diode. Nature 465, 594–597 (2010).

    Article  ADS  Google Scholar 

  10. Kako, S. et al. A gallium nitride single-photon source operating at 200 K. Nature Mater. 5, 887–892 (2006).

    Article  ADS  Google Scholar 

  11. Strauf, S. et al. High-frequency single-photon source with polarization control. Nature Photon. 1, 704–708 (2007).

    Article  ADS  Google Scholar 

  12. Beveratos, A. et al. Single photon quantum cryptography. Phys. Rev. Lett. 89, 187901 (2002).

    Article  ADS  Google Scholar 

  13. Jacques, V. et al. Experimental realization of Wheeler's delayed-choice gedanken experiment. Science 315, 966–968 (2007).

    Article  ADS  Google Scholar 

  14. Mizuochi, N. et al. Coherence of single spins coupled to a nuclear bath of varying density. Phys. Rev. B 80, 041201(R) (2009).

    Article  ADS  Google Scholar 

  15. Balasubramanian, G. et al. Ultralong spin coherence time in isotopically engineered diamond. Nature Mater. 8, 383–387 (2009).

    Article  ADS  Google Scholar 

  16. Fuchs, G. D. et al. Gigahertz dynamics of a strongly driven single quantum spin. Science 326, 1520–1522 (2009).

    Article  ADS  Google Scholar 

  17. Dutt, M. V. G. et al. Quantum register based on individual electronic and nuclear spin qubits in diamond. Science 316, 1312–1316 (2007).

    Article  Google Scholar 

  18. Neumann, P. et al. Multipartite entanglement among single spins in diamond. Science 320, 1326–1329 (2008).

    Article  ADS  Google Scholar 

  19. Buckley, B. B., Fuchs, G. D., Bassett, L. C. & Awschalom, D. D. Spin-light coherence for single-spin measurement and control in diamond. Science 330, 1212–1215 (2010).

    Article  ADS  Google Scholar 

  20. Togan, E. et al. Quantum entanglement between an optical photon and a solid-state spin qubit. Nature 466, 730–735 (2010).

    Article  ADS  Google Scholar 

  21. Koizumi, S., Watanabe, K., Hasegawa, M. & Kanda, H. Ultraviolet emission from a diamond pn junction. Science 292, 1899–1901 (2001).

    Article  ADS  Google Scholar 

  22. Makino, T. et al. Enhancement in emission efficiency of diamond deep-ultraviolet light emitting diode. Appl. Phys. Lett. 99, 061110 (2011).

    Article  ADS  Google Scholar 

  23. Zaitsev, A. M., Bergman, A. A., Gorokhovsky, A. A. & Huang, M. Diamond light emitting diode activated with Xe optical centers. Phys. Status Solidi (a) 203, 638–642 (2006).

    Article  ADS  Google Scholar 

  24. Hauf, V. et al. Chemical control of the charge state of nitrogen-vacancy centers in diamond. Phys. Rev. B 83, 081304(R) (2011).

    Article  ADS  Google Scholar 

  25. Babinec, T. M. et al. A diamond nanowire single-photon source. Nature Nanotech. 5, 195–199 (2010).

    Article  ADS  Google Scholar 

  26. Watkins, P. W. Physical Chemistry 4th edn, ch. 26 (Oxford Univ. Press, 1989).

  27. Sze, S. M. et al. Physics of Semiconductor Devices (Wiley-Interscience, 2006).

  28. Gali, A. Theory of the neutral nitrogen-vacancy center in diamond and its application to the realization of a qubit. Phys. Rev. B 79, 235210 (2009).

    Article  ADS  Google Scholar 

  29. Watanabe, H., Kitamura, T., Nakashima, S. & Shikata, S. Cathodoluminescence characterization of a nitrogen-doped homoepitaxial diamond thin film. J. Appl. Phys. 105, 093529 (2009).

    Article  ADS  Google Scholar 

  30. Felton, S. et al. Electron paramagnetic resonance studies of the neutral nitrogen vacancy in diamond. Phys. Rev. B 77, 081201 (2008).

    Article  ADS  Google Scholar 

  31. Lohrmann, A. et al. Diamond based light-emitting diode for visible single-photon emission at room temperature. Appl. Phys. Lett. 99, 251106 (2011).

    Article  ADS  Google Scholar 

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The authors acknowledge financial support by the Japan Science and Technology Agency (JST) Precursory Research for Embryonic Science and Technology (PRESTO) programme, as well as KAKENHI (grant nos 22102502 and 23681017), the Strategic Information and Communication R&D Promotion Program (SCOPE), the National Institute of Information and Communications Technology (NICT) programme, the JST Core Research for Evolutional Science and Technology (CREST) programme, the European Union (EU) via the grants Solid State Quantum Technology and Metrology Using Spins (SQUTEC), DIAMANT and Solid State Systems for Quantum Information Processing (SOLID), the Deutsche Forschungsgemeinschaft (DFG) via research groups 730, 1482 and 1495, the Max Planck Society, and the Hungarian Scientific Research Fund (OTKA; grant no. K-67886).

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T.M., H.K., D.T. and M.O. synthesized and fabricated the diamond device. N.M. built a home-made confocal microscope system with assistance from P.N., F.J. and J.W., and carried out the measurements. N.M., M.N., H.O., S.Y., P.N., F.J. and J.W. contributed to the data analysis. A.G. carried out group theory analysis and the ab initio calculations. N.M. and J.W. wrote the manuscript with feedback from all authors. All authors discussed the results and commented on the manuscript.

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Correspondence to N. Mizuochi.

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Mizuochi, N., Makino, T., Kato, H. et al. Electrically driven single-photon source at room temperature in diamond. Nature Photon 6, 299–303 (2012).

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