arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.04124cond-mat.mtrl-sci
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高纯六方氮化硼晶体的高效单光子发射

Efficient single photon emission from a high-purity hexagonal boron nitride crystal

L. J. Martínez, T. Pelini, V. Waselowski, J. R. Maze, B. Gil, G. Cassabois, V. Jacques

摘要:

在用作范德华异质结构中的构建块的各种层状材料中,六方氮化硼(hBN)由于其大的带隙($\sim 6$ eV)而作为容纳光学活性缺陷的理想平台出现。在这里,我们研究了高纯度hBN晶体在绿色激光照射下的光学响应。通过光子相关测量,我们确定在环境条件下发射高度光稳定荧光的单个缺陷。详细的物理性质的分析揭示了辐射跃迁的高量子效率,导致具有非常高的亮度的单光子源。这些结果说明了hBN提供的广泛应用如何进一步扩展到基于光子的量子信息科学和计量学。

英文摘要:

Among a variety of layered materials used as building blocks in van der Waals heterostructures, hexagonal boron nitride (hBN) appears as an ideal platform for hosting optically-active defects owing to its large bandgap ($\sim 6$ eV). Here we study the optical response of a high-purity hBN crystal under green laser illumination. By means of photon correlation measurements, we identify individual defects emitting a highly photostable fluorescence under ambient conditions. A detailed analysis of the photophysical properties reveals a high quantum efficiency of the radiative transition, leading to a single photon source with very high brightness. These results illustrate how the wide range of applications offered by hBN could be further extended to photonic-based quantum information science and metrology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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