Excitation-Dependent Features and Artifacts in 2-D Terahertz Spectroscopy
Optics
2024-09-06 v1 Materials Science
Abstract
Recently, two-dimensional terahertz spectroscopy (2DTS) has attracted increasing attention for studying complex solids. A number of recent studies have applied 2DTS either with long pulses or away from any material resonances, situations that yield unconventional 2DTS spectra that are often difficult to interpret. Here, we clarify the generic origins of observed spectral features by examining 2DTS spectra of ZnTe, a model system with a featureless optical susceptibility at low terahertz frequencies. These results also reveal possible artifacts that may arise from electro-optic sampling in collinear 2DTS experiments, including the observation of spurious rectified or second harmonic signals.
Keywords
Cite
@article{arxiv.2405.00971,
title = {Excitation-Dependent Features and Artifacts in 2-D Terahertz Spectroscopy},
author = {Albert Liu and Ankit Disa},
journal= {arXiv preprint arXiv:2405.00971},
year = {2024}
}