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.
Highlights
Rapid and precise measurements of light-matter interactions are crucial in understanding the complex properties of materials[1,2,3,4,5,6,7,8]
Optical MDCS is an advanced non-linear technique that uses a sequence of laser pulses incident to the sample and detects the Four-Wave-Mixing (FWM) signal generated by the sample as a function of the time delay(s) between the incident pulses
We have performed a marriage between MDCS and dual comb spectroscopy (DCS), which we call M-DSC2, that allows us to perform multi-dimensional coherent spectroscopy that is simultaneously rapid, background free and high
Summary
Rapid and precise measurements of light-matter interactions are crucial in understanding the complex properties of materials[1,2,3,4,5,6,7,8]. Optical MDCS is an advanced non-linear technique that uses a sequence of laser pulses (typically three) incident to the sample and detects the Four-Wave-Mixing (FWM) signal generated by the sample as a function of the time delay(s) between the incident pulses.
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