Inverse design couplers for the excitation of odd plasmonic pairs in thin semiconducting films

Marius Puplauskis, Ivan A. Pshenichnyuk

Research output: Contribution to journalArticlepeer-review

Abstract

A set of grating couplers that converts plane waves into odd pairs of plasmons supported by extremely thin layers of doped indium tin oxide is designed. The inverse design approach is implemented to improve the efficiency of ordinary periodical couplers significantly. The optimization code based on the gradient descent method and direct Maxwell solver is designed in Matlab. Three models with different optimization levels are compared and discussed. The results of calculations are prepared for subsequent experimental verification. Considered odd plasmonic pairs represent an example of high quality modes tunable using a field effect. They are potentially applicable for the implementation in various active electro-optical devices and lead the way to fully semiconductor based plasmonics.

Original languageEnglish
Article number127639
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume414
DOIs
Publication statusPublished - 29 Oct 2021

Keywords

  • Grating coupler
  • Inverse design
  • Nanophotonics
  • Odd plasmonic pair
  • Semiconductor plasmonics
  • Thin film

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