Phonon-polaritons in Zn(1-x)MgxTe (x<0.09): A Raman scattering study
Abstract
Phonon-polaritons (PP) are phonon-photon coupled modes. Using near-forward Raman scattering, the PP of the cubic Zn(1-x)MgxTe (x<0.09) semiconductor alloy could be measured. While the PP-coupling hardly develops in pure ZnTe, minor Mg-alloying suffices to stabilize a long-lifetime PP strongly bound to the lattice, i.e., with a pronounced phonon character, and yet a fast one originating from the highly dispersive photon-like bottleneck of the PP-dispersion. By combining the advantages of a phonon and of a photon, the long-lifetime PP generated by minor Mg-alloying of ZnTe marks an improvement over the PP of pristine ZnTe, that, from the Raman cross section calculation, can only achieve a balanced compromise between the two kinds of advantages, intensity and speed. The discussion of the PP-related lattice dynamics of Zn(1-x)MgxTe (x<0.09) is grounded in a preliminary study of the lattice macro- and microstructure using X-ray diffraction and solid-state nuclear magnetic resonance, respectively, and further relies on ab initio calculations of the native phonon modes behind the PP in the Mg-dilute limit of Zn(1-x)MgxTe (x~0), considering various Mg-isotopes.
Cite
@article{arxiv.2504.10977,
title = {Phonon-polaritons in Zn(1-x)MgxTe (x<0.09): A Raman scattering study},
author = {D. Singh and A. Elmahjoubi and O. Pages and V. J. B. Torres and C. Gardiennet and G. Kervern and A. Polian and Y. Le Godec and J. -P. Itie and S. Diliberto and S. Michel and P. Franchetti and K. Strzalkowski},
journal= {arXiv preprint arXiv:2504.10977},
year = {2025}
}
Comments
19 pages, 7 figures