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Photophysics of GaN single-photon emitters in the visible spectral range

机译：可见光谱范围内GaN单光子发射器的光物理

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摘要

In this work, we present a detailed photophysical analysis of recently discovered, optically stable single-photon emitters (SPEs) in gallium nitride (GaN). Temperature-resolved photoluminescence measurements reveal that the emission lines at 4 K are three orders of magnitude broader than the transform-limited width expected from excited-state lifetime measurements. The broadening is ascribed to ultrafast spectral diffusion. The photophysical study on several emitters at room temperature (RT) reveals an average brightness of (427 ± 215)kCounts/s. Finally, polarization measurements from 14 emitters are used to determine visibility as well as dipole orientation of defect systems within the GaN crystal. Our results underpin some of the fundamental properties of SPEs in GaN both at cryogenic and RT, and define the benchmark for future work in GaN-based single-photon technologies.
机译：在这项工作中，我们将对氮化镓（GaN）中最近发现的光学稳定的单光子发射器（SPE）进行详细的光物理分析。温度分辨的光致发光测量结果表明，在4 K处的发射线比激发态寿命测量所期望的变换极限宽度宽三个数量级。增宽归因于超快光谱扩散。在室温（RT）下对几个发射器进行的光物理研究表明，平均亮度为（427±215）kCounts / s。最后，来自14个发射器的极化测量结果用于确定GaN晶体内缺陷系统的可见性以及偶极子方向。我们的结果巩固了GaN中SPE在低温和RT下的一些基本特性，并确定了基于GaN的单光子技术未来工作的基准。

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  • 来源
    《Physical review》 |2018年第16期|165202.1-165202.8|共8页
  • 作者

    Amanuel M Berhane; Kwang-Yong Jeong; Carlo Bradac; Michael Walsh; Dirk Englund; Milos Toth; Igor Aharonovich;

  • 作者单位

    School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia;

    Department of Electrical Engineering and Computer Science, MIT, Cambridge, Massachusetts 02139, USA,Department of Nano Science and Technology, Gachon University, Gyeonggi-do 13120, Republic of Korea;

    School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia;

    Department of Electrical Engineering and Computer Science, MIT, Cambridge, Massachusetts 02139, USA;

    Department of Electrical Engineering and Computer Science, MIT, Cambridge, Massachusetts 02139, USA;

    School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia;

    School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales, 2007, Australia;

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