Nonlinear Terahertz Electroluminescence from Dirac Landau Polaritons
Abstract
We report Dirac Landau polaritons observed by terahertz (THz) magnetoreflectivity spectroscopy, demonstrating strong coupling between cyclotron transitions of two-dimensional (2D) Dirac fermions in HgTe quantum wells and optical cavity modes. Under pulsed electrical injection we observe efficient nonlinear electroluminescence, with a strongly out-of-equilibrium polariton distribution dominated by emission from the upper polariton branches. Model analysis of the bias-dependent emission intensity and spectral narrowing indicates a polariton occupancy per mode approaching unity, with a possible contribution from stimulated polariton emission in the spectral region of the upper anticrossing. These results open prospects toward Dirac Landau polariton condensates and low-threshold, tunable THz polariton lasers based on cyclotron emission.
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Cite
@article{arxiv.2502.07897,
title = {Nonlinear Terahertz Electroluminescence from Dirac Landau Polaritons},
author = {B. Benhamou-Bui and C. Consejo and S. S. Krishtopenko and S. Ruffenach and C. Bray and J. Torres and J. Dzian and F. Le Mardelé and A. Pagot and X. Baudry and S. V. Morozov and N. N. Mikhailov and S. A. Dvoretskii and B. Jouault and P. Ballet and M. Orlita and C. Ciuti and F. Teppe},
journal= {arXiv preprint arXiv:2502.07897},
year = {2026}
}
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