Impedance-controlled Laser Dynamics in Near-Zero Index Media

Abstract

Near-zero-index (NZI) media have been explored for controlling spontaneous emission, but their impact on stimulated emission and lasing properties remains unexplored within their different classes, i.e., epsilon-near-zero (ENZ), mu-near-zero (MNZ), or epsilon-and-mu-near-zero (EMNZ). Here, we show theoretically that lasing emission depends on the class of NZI medium and can be controlled through its impedance. The major difference, as compared to conventional laser media, arises from the incorporation of dispersive electric and magnetic properties in the derivation of the Maxwell Boch equations. In this framework, the analysis of laser rate equation reveals that the ENZ class, with high impedance, can reduce the lasing threshold through enhanced electric-field interaction. Numerical simulations further show that the NZI class also governs the spectral response: whereas ENZ and MNZ classes suffer from multimode emission, the EMNZ class preserves single-mode emission.

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BibTeX RIS

BibTeX

@misc{debacq2026impedancecontrolled,
  title = {{Impedance-controlled Laser Dynamics in Near-Zero Index Media}},
  author = {Adrien Debacq and Andrei V. Lavrinenko and Elizaveta Semenova and Olivier Deparis and Michaël Lobet},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.04578},
  eprint = {2611.04578},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.04578},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Impedance-controlled Laser Dynamics in Near-Zero Index Media
AU  - Adrien Debacq
AU  - Andrei V. Lavrinenko
AU  - Elizaveta Semenova
AU  - Olivier Deparis
AU  - Michaël Lobet
PY  - 2026
DA  - 2026/11/03
PB  - arXiv
DO  - 10.48550/arxiv.2611.04578
UR  - https://arxiv.org/abs/2611.04578
AB  - Near-zero-index (NZI) media have been explored for controlling spontaneous emission, but their impact on stimulated emission and lasing properties remains unexplored within their different classes, i.e., epsilon-near-zero (ENZ), mu-near-zero (MNZ), or epsilon-and-mu-near-zero (EMNZ). Here, we show theoretically that lasing emission depends on the class of NZI medium and can be controlled through its impedance. The major difference, as compared to conventional laser media, arises from the incorporation of dispersive electric and magnetic properties in the derivation of the Maxwell Boch equations. In this framework, the analysis of laser rate equation reveals that the ENZ class, with high impedance, can reduce the lasing threshold through enhanced electric-field interaction. Numerical simulations further show that the NZI class also governs the spectral response: whereas ENZ and MNZ classes suffer from multimode emission, the EMNZ class preserves single-mode emission.
ER  -

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