Stability of active photonic metasurface pairs

Constantinos Valagiannopoulos*, Sergei A. Tretyakov

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)
162 Downloads (Pure)

Abstract

Adding active components to a photonic device may dramatically enrich and improve its performance but, at the same time, creates the risk of instability, namely, occurrence of unwanted self-oscillations. Stability considerations are not always given the attention they deserve when setups employing gain media are investigated; thus, the desired effects or reported regimes may not be achievable. In this work, a generic electromagnetic configuration comprising a pair of planar impedance metasurfaces is examined and analytical stability conditions for its operation are derived. The obtained results for the analyzed basic module can shed light on the stability conditions of more complex active systems that incorporate such components and serve a broad range of applications from imaging and polarization engineering to invisibility cloaking and wavefront transformations.

Original languageEnglish
Article number113045
Number of pages15
JournalNew Journal of Physics
Volume23
Issue number11
DOIs
Publication statusPublished - Nov 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • stability
  • metasurface
  • active media

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