Nanolayer-embedded pseudo-photonic crystals

Byoung Jun Park, Young Ho Jin, Nu Ri Park, Jin Tae Kim, Myung Ki Kim

Research output: Contribution to journalArticle

Abstract

In recent years, novel high-performance nanophotonic devices have been realized by applying ultrathin two-dimensional nanolayer materials to nanophotonics. In this paper, we propose nanolayer-embedded compact pseudo-photonic crystals (PPCs) that enable strong interaction between ultrathin nanolayers and photonic crystal modes. In typical two-dimensional slab photonic crystals, the transverse-magnetic (TM) photonic crystal bandgap is not well formed, making it difficult to operate the TM photonic crystal waveguide modes. However, by utilizing the low-frequency TM PPC bands, a long propagation TM waveguide mode, a slow TM waveguide mode, and a TM photonic bandgap are all readily available. In particular, the insertion of a nanometer-thick low-refractive-index layer in the vertical center of TM PPC waveguide can localize the electric fields tightly in nanometer space, causing strong field interaction with the inserted nanolayer material. Using the TM slow light near PPC band edges, field interaction with the nanolayer is significantly enhanced. We can also realize nanolayer-embedded high-quality-factor (Q-factor > 104) PPC cavities using the TM PPC bandgap. We believe that the proposed TM PPCs will play an important role in the strong interaction of ultrathin nanolayer materials with photonic crystal modes.

Original languageEnglish
Article number47LT01
JournalNanotechnology
Volume30
Issue number47
DOIs
Publication statusPublished - 2019 Sep 9

Keywords

  • photonic crystals
  • pseudo-photonic crystals
  • slot resonators
  • slot waveguides

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Park, B. J., Jin, Y. H., Park, N. R., Kim, J. T., & Kim, M. K. (2019). Nanolayer-embedded pseudo-photonic crystals. Nanotechnology, 30(47), [47LT01]. https://doi.org/10.1088/1361-6528/ab3d74