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    Color centers in phosphorus-doped diamond for bright single-photon emission under electrical pumping

    Deutsche Forschungsgemeinschaft (DFG) / Russian Foundation for Basic Research (RFBR):

    2019-2021, 19-57-12008, Color centers in phosphorus-doped diamond for bright single-photon emission under electrical pumping / Центры окраски в легированном алмазе для ярких однофотонных источников излучения с электрической накачкой.


    Efficient and scalable single-photon sources (SPSs) are crucial to the development of numerous quantum information technologies, such as optical quantum computers and unconditionally secure communication lines. SPSs based on quantum dots have shown much progress in the last two decades, but under ambient conditions they are being overcome by the recent advances in color centers in diamond and related wide-bandgap semiconductors. Color centers are point defects in the crystal lattice that behave nearly as isolated atoms. This property allows to obtain bright photo- and electroluminescence with a sharp emission spectrum, which cannot be achieved with any other quantum optoelectronic system under ambient conditions. However, it is still challenging to design scalable and reproducible technologies based on these emitters. In particular, it is difficult to precisely combine them with photonic and electronic nanostructures that are needed for achieving high brightness and control.

    This project aims at developing and investigating a novel class of bright SPSs on diamond, which operate under ambient conditions and that can be efficiently electrically driven. The project will generate an interdisciplinary collaboration and it is based on two recently proposed concepts. First, to enhance the emission properties of the color center we will use a planar antenna, which enables large extraction efficiencies and strong directional emission from materials with a large refractive index. This approach does not require fine spectral tuning nor precise positioning of the emitter at the nanoscale, which is beneficial for fabrication and device operation. Second, we will employ a novel electrical pumping scheme based on a Schottky diode, which gives the possibility of efficiently injecting minority carriers in diamond directly from the metal and it does not require complex and expensive p-i-n and p-n diamond junctions. We will create high-quality silicon-vacancy (SiV) centers in less than 100-nm-thick diamond membranes and build a planar antenna with electrodes on it. We will investigate the photon emission properties (focusing on brightness, directionality) under optical pumping and explore the possibility of electrical excitation of SiV centers at room an higher temperatures. Thus, we will demonstrate a proof of concepts of a highly efficient and chip-scale SPS that will serve as, and inspire, novel photonic sources for quantum information and quantum communication. Our activities will also generate valuable knowledge in nanophotonics and materials science, which shall be transferred to other application areas.

    Cooperation partner:

    M. Agio, University of Siegen


    1. M. Widmann, M. Niethammer, D.Yu. Fedyanin, I.A. Khramtsov, T. Rendler, I.D. Booker, J.U. Hassan, N. Morioka, Y.-C. Chen, I.G. Ivanov, N.T. Son, T. Ohshima, M. Bockstedte, A. Gali, C. Bonato, S.-Y. Lee, J. Wrachtrup, Electrical charge state manipulation of single silicon vacancies in a silicon carbide quantum optoelectronic device // Nano Letters 19, 7173-7180 (2019) [link]

    2. I.A. Khramtsov, M. Agio, D.Yu. Fedyanin, Electrical excitation of color centers in diamond: toward practical single-photon sources // AIP Conference Proceedings (accepted).

    3. I.A. Khramtsov, D.Yu. Fedyanin, Bright Single-Photon Emitting Diodes Based on the Silicon-Vacancy Center in AlN/Diamond Heterostructures // Nanomaterials 10(2), 361 (2020) [link]

    4. K. Bray, D. Yu. Fedyanin, I. A. Khramtsov, M. Bilokur, B. Regan, M. Toth, I. Aharonovich, Electrical excitation and charge-state conversion of silicon vacancy color centres in single crystal diamond membranes // Applied Physics Letters 116, 101103 (2020) [link]


    1. I.A. Khramtsov, D.Yu. Fedyanin "Temporal Dynamics of Electrically Driven Single-Photon Sources Based on Color Centers in Diamond" // Quantum 2019, 26 May - 01 June 2019, Turin, Italy (oral).

    2.  I.M. Fradkin, M. Agio, D.Yu. Fedyanin "Efficient extraction of photons from single silicon vacancies in diamond using plasmonic nanoantenna" // Nanophotonics and Micro/Nano Optics International Conference 2019, 4-6 September 2019, Munich, Germany (oral).

    3.  D.Yu. Fedyanin, I.A. Khramtsov "Superinjection in diamond P-I-N diodes" // 30th International Conference on Diamond and Carbon Materials, 8-12 September 2019, Seville, Spain (oral).

    4. I.A. Khramtsov, D.Yu. Fedyanin "Bright single-photon electroluminescence of a single SiV center in diamond" // 30th International Conference on Diamond and Carbon Materials, 8-12 September 2019, Seville, Spain (oral).

    5. I.A. Khramtsov, M. Agio, D.Yu. Fedyanin “Electrical Excitation of Color Centers in Diamond: Toward Practical Single-Photon Sources” // 2D MATERIALS Congress 2019, 30 September - 4 October, Sochi, Russia (poster).

    6. I.A. Khramtsov, D.Yu. Fedyanin "One photon per pulse emission from NV centers in diamond under electrical excitation at high repetition rates" // Single-Photon Workshop 2019, 21 - 25 October 2019, Milan, Italy (poster).

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