An accurate quantification of homogeneous and inhomogeneous linewidths is essential for a material’s applications in quantum information. Multidimensional coherent spectroscopy (MDCS) is a powerful technique that is often used for this purpose. However, the current analyses methods we only applicable for Gaussian inhomogeneous profiles. The research group of Dr. Rohan Singh [Department of Physics] have developed a novel framework that enables precise lineshape analysis in systems with arbitrary, non-Gaussian inhomogeneous broadening. The team introduced a simulation procedure based on a bivariate spectral distribution function and an iterative fitting algorithm that extracts both the homogeneous linewidth and the true inhomogeneous distribution from experimental spectra. Demonstrated using quantum-well exciton resonance of GaAs interfacial quantum dots, their method accurately models spectral diffusion and resolves fine spectral features. This advancement significantly broadens the applicability of MDCS in materials research and quantum information. For more details, kindly visit https://doi.org/10.1364/OL.564956
