Check-probe spectroscopy of lifetime-limited emitters in bulk-grown silicon carbide

IF 6.6 1区 物理与天体物理 Q1 PHYSICS, APPLIED
G. L. van de Stolpe, L. J. Feije, S. J. H. Loenen, A. Das, G. M. Timmer, T. W. de Jong, T. H. Taminiau
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Abstract

Solid-state single-photon emitters provide a versatile platform for exploring quantum technologies such as optically connected quantum networks. A key challenge is to ensure the optical coherence and spectral stability of the emitters. Here, we introduce a high-bandwidth ‘check-probe’ scheme to quantitatively measure (laser-induced) spectral diffusion and ionisation rates, as well as homogeneous linewidths. We demonstrate these methods on single V2 centres in commercially available bulk-grown 4H-silicon carbide. Despite observing significant spectral diffusion under laser illumination (GHz s−1), the optical transitions are narrow (~35 MHz), and remain stable in the dark (1 s). Through Landau-Zener-Stückelberg interferometry, we determine the optical coherence to be near-lifetime limited (T2 = 16.4(4) ns), hinting at the potential for using bulk-grown materials for developing quantum technologies. These results advance our understanding of spectral diffusion of quantum emitters in semiconductor materials, and may have applications for studying charge dynamics across other platforms.

Abstract Image

体生长碳化硅中寿命限制发射体的检查探针光谱
固态单光子发射器为探索量子技术(如光连接量子网络)提供了一个通用的平台。一个关键的挑战是确保发射体的光学相干性和光谱稳定性。在这里,我们引入了一种高带宽“检查探针”方案来定量测量(激光诱导的)光谱扩散和电离率,以及均匀线宽。我们在商业上可用的大块生长的4h碳化硅的单个V2中心上演示了这些方法。尽管在激光照射下观察到明显的光谱扩散(> GHz s−1),但光学跃迁很窄(~35 MHz),并且在黑暗中保持稳定(> 1s)。通过landau - zener - st ckelberg干涉测量,我们确定了光学相干性是近寿命限制的(T2 = 16.4(4) ns),这暗示了使用体生长材料开发量子技术的潜力。这些结果促进了我们对半导体材料中量子发射体光谱扩散的理解,并可能应用于研究其他平台上的电荷动力学。
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来源期刊
npj Quantum Information
npj Quantum Information Computer Science-Computer Science (miscellaneous)
CiteScore
13.70
自引率
3.90%
发文量
130
审稿时长
29 weeks
期刊介绍: The scope of npj Quantum Information spans across all relevant disciplines, fields, approaches and levels and so considers outstanding work ranging from fundamental research to applications and technologies.
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