Abstract
The detection of weak features in spectra remains a challenge. Differentiation remains a standard method, but maximum-entropy filters provide an alternative. Using dielectric-function data for MoSe2 as a test case, we compare the capabilities of two maximum-entropy filters, the original Burg version and its corrected offshoot, to detect the biexciton and determine its energy. In contrast to differentiation, both approaches detect the biexciton. However, neither provides accurate values of the excitonic transition energies in this spectral range, although the Burg version is somewhat better.
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Acknowledgements
L.V.L. acknowledges the support of this work by the Vingroup Innovation Foundation (VinIF) (Grant No. VINIF.2022.STS.46) and the Vietnam Academy of Science and Technology (Grant No.THTEXS.01/21-24). T.J.K. acknowledges the support by the National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (NRF-2021R1A2C1005359 and NRF-2020R1A5A1016518).
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Le, L.V., Kim, T.J., Kim, Y.D. et al. Deconvolution of the biexciton structure of monolayer MoSe2 in spectroscopic ellipsometric data: a comparison of maximum-entropy methods. J. Korean Phys. Soc. (2024). https://doi.org/10.1007/s40042-024-01123-6
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DOI: https://doi.org/10.1007/s40042-024-01123-6