论文标题
通过边缘像素参考，Attosend瞬时吸收光谱中的源噪声抑制
Source noise suppression in attosecond transient absorption spectroscopy by edge-pixel referencing
论文作者
论文摘要
Attosend瞬时吸收光谱（ATA）用于观察具有出色时间分辨率的光激发动力学。该技术的主要实验挑战是，与其他技术相比，高谐波生成来源显示出明显的不稳定性，从而导致低于PAR的灵敏度。本文提出了边缘像素引用是抑制这种噪音的一种手段。引入了两种方法：第一种方法是确定性的，并使用相关分析，而第二种则依赖于单数值分解。在$ \ text {ws} _2 $上进行的嘈杂测量中，对每种方法进行了量化和量化，并导致灵敏度提高五倍。这两种方法的组合确保了过程的保真度，并且可以在实时数据收集和现有数据集中实现。结果表明，边缘引用方法在检测器噪声底附近带来了ATA的灵敏度。提供后处理代码的实现向读者提供。
Attosecond transient absorption spectroscopy (ATAS) is used to observe photoexcited dynamics with outstanding time resolution. The main experimental challenge of this technique is that high-harmonic generation sources show significant instabilities, resulting in sub-par sensitivity when compared to other techniques. This paper proposes edge-pixel referencing as a means to suppress this noise. Two approaches are introduced: the first is deterministic and uses a correlation analysis, while the second relies on singular value decomposition. Each methods is demonstrated and quantified on a noisy measurement taken on $\text{WS}_2$ and results in a fivefold increase in sensitivity. The combination of the two methods ensures the fidelity of the procedure and can be implemented on live data collection but also on existing datasets. The results show that edge-referencing methods bring the sensitivity of ATAS near the detector noise floor. An implementation of the post-processing code is provided to the reader.
