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Nonreciprocal plasmonic response of drift-biased two-dimensional metals

  • Gonzalo Álvarez-Pérez
  • Joel D. Cox
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Abstract

We develop a nonlocal electrodynamic framework for drift-biased two-dimensional electron gases (2DEGs) with Dirac (linear) and parabolic (quadratic) dispersions, deriving closed-form drift-dependent conductivity tensors from the Boltzmann transport equation. We obtain the plasmon dispersion and near-field emission of a point dipole, revealing nonreciprocal propagation in both systems. At equal drift parameter, the parabolic 2DEG exhibits stronger nonreciprocity than the Dirac system, although we find that a larger drift parameter does not by itself produce stronger nonreciprocity: the response is set by the interplay of drift and plasmon nonlocality. As such, the combination of strong nonlocality and experimentally accessible drift velocities of semiconductor 2DEGs identifies parabolic systems as a promising platform for tunable, nonreciprocal plasmonics.

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Cite

BibTeXRIS
BibTeX
@misc{alvarezperez2026nonreciprocal,
  title = {{Nonreciprocal plasmonic response of drift-biased two-dimensional metals}},
  author = {Gonzalo Álvarez-Pérez and Joel D. Cox},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.04954},
  eprint = {2609.04954},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.04954},
  note = {CC BY-NC-SA 4.0},
}
RIS
TY  - UNPB
TI  - Nonreciprocal plasmonic response of drift-biased two-dimensional metals
AU  - Gonzalo Álvarez-Pérez
AU  - Joel D. Cox
PY  - 2026
DA  - 2026/09/04
PB  - arXiv
DO  - 10.48550/arxiv.2609.04954
UR  - https://arxiv.org/abs/2609.04954
AB  - We develop a nonlocal electrodynamic framework for drift-biased two-dimensional electron gases (2DEGs) with Dirac (linear) and parabolic (quadratic) dispersions, deriving closed-form drift-dependent conductivity tensors from the Boltzmann transport equation. We obtain the plasmon dispersion and near-field emission of a point dipole, revealing nonreciprocal propagation in both systems. At equal drift parameter, the parabolic 2DEG exhibits stronger nonreciprocity than the Dirac system, although we find that a larger drift parameter does not by itself produce stronger nonreciprocity: the response is set by the interplay of drift and plasmon nonlocality. As such, the combination of strong nonlocality and experimentally accessible drift velocities of semiconductor 2DEGs identifies parabolic systems as a promising platform for tunable, nonreciprocal plasmonics.
ER  -