Multi-heterodyne two dimensional coherent spectroscopy using frequency combs

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Abstract

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.

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Lomsadze, B., & Cundiff, S. T. (2017). Multi-heterodyne two dimensional coherent spectroscopy using frequency combs. Scientific Reports, 7(1). https://doi.org/10.1038/s41598-017-14537-z

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