We propose an all-optical method to directly reconstruct the band structure of semiconductors. Our scheme is based on the temporal Young's interferometer realized by high harmonic generation (HHG) with a few-cycle laser pulse. As a time-energy domain interferometric device, temporal interferometer encodes the band structure into the fringe in the energy domain. The relation between the band structure and the emitted harmonic frequencies is established. This enables us to retrieve the band structure from the HHG spectrum with a single-shot measurement. Our scheme paves the way to study matters under ambient conditions and to track the ultrafast modification of band structures.
Pulsed Frequency Shifted Feedback Laser for Accurate Long Distance Measurements: Beat Order Determination
对于许多应用来说，远距离测量（10 m - 1000 m）且精度达到10-7是一个挑战。我们表明，这是可以实现的频移反馈（FSF）激光干涉技术，提供的射频拍频顺序的确定作出没有歧义和时间尺度上兼容的大气应用。使用脉冲FSF激光器，我们开发的激光导星应用，我们提出和测试，高达240米，一个简单的方法，用于测量拍阶实时。对动梳模型和Yatsenko模型也进行了讨论。这些模型中的第一个未能解释我们的长距离干涉测量结果。我们表明，长距离测量的精度主要取决于稳定的调制器的声频。
Revealing time characteristics of optical excitations in dielectric and plasmonic structures through cathodoluminescence interferometry
NWO-Institute AMOLF（荷兰皇家艺术与科学学院AMOLF研究所）；Kobe University（神户大学）；Universitat Rovira i Virgili（罗维拉-伊-维尔吉利大学）；ICREA-Institució Catalana de Recerca i Estudis Avançats（加泰罗尼亚研究与高等研究院）；ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology（巴塞罗那科技研究所光子科学研究所）
University of Connecticut（康涅狄格大学）；Eastern Institute of Technology（东方理工学院）；Technion – Israel Institute of Technology（以色列理工学院）；Guangdong Technion – Israel Institute of Technology（广东以色列理工学院）
