Lomsadze Bachana, Cundiff Steven T
Department of Physics, University of Michigan, Ann Arbor, Michigan, 48109, USA.
JILA, University of Colorado & National Institute of Standards and Technology, Boulder, Colorado, 80309, USA.
Sci Rep. 2017 Oct 25;7(1):14018. doi: 10.1038/s41598-017-14537-z.
Optical multi-dimensional coherent spectroscopy is a powerful technique for studying the structure, properties and ultrafast dynamics of atoms, molecules, semiconductor materials and complex systems. Current implementations of multi-dimensional coherent spectroscopy have long acquisition times and/or limited spectral resolution. In addition, most of the techniques utilize complex geometries or phase cycling schemes to isolate non-linear signals. We demonstrate a novel approach of using frequency combs to perform rapid, high resolution and background free multi-dimensional coherent spectroscopy of semiconductor materials. Our approach is inspired by dual-comb spectroscopy, which has been proven to be a versatile tool for obtaining one dimensional absorption spectra with high resolution in a short acquisition time. We demonstrate the method using a GaAs multi-quantum well sample.
光学多维相干光谱技术是研究原子、分子、半导体材料和复杂系统的结构、性质及超快动力学的有力手段。目前多维相干光谱技术的实现方式存在采集时间长和/或光谱分辨率有限的问题。此外，大多数技术采用复杂的几何结构或相位循环方案来分离非线性信号。我们展示了一种利用频率梳对半导体材料进行快速、高分辨率且无背景的多维相干光谱分析的新方法。我们的方法受双梳光谱技术的启发，双梳光谱技术已被证明是一种在短采集时间内获得高分辨率一维吸收光谱的通用工具。我们用砷化镓多量子阱样品演示了该方法。
