标题： 飞秒级跟踪富勒烯中的光吸收和折射 显示英文标题

标题： Attosecond tracking of light absorption and refraction in fullerenes

摘要： 物质的集体响应是普遍存在的，并被广泛应用于等离子体、光学和电子器件中。 在这里，我们在阿秒时间尺度上追踪有限系统中集体激发的产生，并在此范围内发现了独特的新特性。 结合量子化学计算与量子动力学方法，我们计算了富勒烯中的时间依赖光吸收和折射，这些作为集体模式出现的指标。 我们通过解析模型解释了数值计算得到的新瞬态特征，并指出了其在超快光子和电子应用中的相关性。 提出了一种方案，通过新兴的阿秒计量学来测量预测的效果。 显示英文摘要

摘要： The collective response of matter is ubiquitous and widely exploited, e.g. in plasmonic, optical and electronic devices. Here we trace on an attosecond time scale the birth of collective excitations in a finite system and find distinct new features in this regime. Combining quantum chemical computation with quantum kinetic methods we calculate the time-dependent light absorption and refraction in fullerene that serve as indicators for the emergence of collective modes. We explain the numerically calculated novel transient features by an analytical model and point out the relevance for ultra-fast photonic and electronic applications. A scheme is proposed to measure the predicted effects via the emergent attosecond metrology.