A direct method to calculate second-order two-dimensional terahertz spectroscopy in frequency-domain based on classical theory

Abstract

Previous theoretical researches on the two-dimensional terahertz spectroscopy (2DTS), which are conducted via inefficiently time-consuming numerical simulation, deal with only single-mode system. To overcome the limitations, we derive a classical-theory-based analytical solution which is applicable to multi-modes system. Three typical weak sources of nonlinearities are introduced. The findings suggest that the analytical results correspond well with those obtained by the traditional numerical simulation. Thus the study provides a more efficient and practical method to directly calculate 2DTS, and, in a broader sense, sheds new light on the theory of 2DTS.

Keywords

two-dimensional spectroscopy / terahertz / classical method

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Acknowledgements

We acknowledge the support from the National Natural Science Foundation of China (Grant Nos. 11574105, 61475054, 61405063 and 61177095), and the Fundamental Research Funds for the Central Universities (No. 2017KFYXJJ029).

RIGHTS & PERMISSIONS

2018 Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature