论文标题
在二维纳米材料中破译超快光体物理学的路线图
A Roadmap to Decipher Ultrafast Photophysics in Two-Dimensional Nanomaterials
论文作者
论文摘要
对原子上的二维（2D）半导体进行了广泛研究，以进行需要强烈的光相互作用的光电应用。鉴于这种应用，必须了解（照片）在高载体密度条件下（Photo）激发如何改变这些材料的非线性光学响应。宽带瞬态吸收（TA）光谱学目前是一种广泛使用的工具，用于研究这种高度激发的系统中的半导体物理。但是，2D材料中不同多体相互作用之间的复杂相互作用会产生高度拥挤的光谱信息和随之而来的非平凡的非线性照相响应，从而掩盖了所需的固有光生理学。在此，我们概述了一个简洁的路线图，用于根据对各种2D材料的TA分析示例分析此类拥挤的数据集。特别是，我们强调了基于线形状及其衍生物对瞬态光响应的最初定性理解与随之而来的定量光谱反应之间的协同作用，并得到了这种见解支持的定量光谱反应。
Atomically thin two-dimensional (2D) semiconductors are extensively investigated for opto-electronic applications that require strong light-matter interactions. In view of such applications, it is essential to understand how (photo)excitation alters the non-linear optical response of these materials under high carrier density conditions. Broadband transient absorption (TA) spectroscopy is by now a widely used tool to study semiconductor physics in such highly excited systems. However, the complex interplay between different many-body interactions in 2D materials produces highly congested spectral information and an ensuing non-trivial nonlinear photo-response, thereby masking the desired intrinsic photophysics. Herein, we outline a concise roadmap for analyzing such congested datasets based on examples of TA analysis of various 2D materials. In particular, we emphasize the synergy between an initial qualitative understanding of the transient photo-response based on line shapes and their derivatives, and a consequent quantitative spectral deconvolution backed by such insights.
