Polarization and Phase Textures in Lattice Plasmon Condensates

Jani M. Taskinen, Pavel Kliuiev, Antti J. Moilanen, Päivi Törmä*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Polarization textures of light may reflect fundamental phenomena, such as topological defects, and can be utilized in engineering light beams. They have been observed, for instance, in photonic crystal lasers and semiconductor polariton condensates. Here we demonstrate domain wall polarization textures in a plasmonic lattice Bose-Einstein condensate. A key ingredient of the textures is found to be a condensate phase that varies spatially in a nontrivial manner. The phase of the Bose-Einstein condensate is reconstructed from the real- and Fourier-space images using a phase retrieval algorithm. We introduce a simple theoretical model that captures the results and can be used for design of the polarization patterns and demonstrate that the textures can be optically switched. The results open new prospects for fundamental studies of non-equilibrium condensation and sources of polarization-structured beams.

Original languageEnglish
Pages (from-to)5262-5268
Number of pages7
JournalNano Letters
Volume21
Issue number12
Early online date2021
DOIs
Publication statusPublished - 23 Jun 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Bose-Einstein condensation
  • nanophotonics
  • plasmonics
  • surface lattice resonance
  • surface plasmon polariton

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