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Ultrabroadband and Flattened Dispersion in Aluminum Nitride Slot Waveguides

  • Jiayuan Li
  • , Ke Xu*
  • , Jiangbing Du
  • *Corresponding author for this work
  • Harbin Institute of Technology Shenzhen
  • Shanghai Jiao Tong University

Research output: Contribution to journalArticlepeer-review

Abstract

Aluminum nitride (AlN) is an emerging platform for a wide range of on-chip applications. One promising feature is that both the second- and third-order nonlinearities are available in crystalline AlN waveguides. We design an AlN slot waveguide with a flat and low dispersion over an ultrawide spectral range from near-infrared to mid-infrared. A dual-slot structure is designed and the flattened group velocity dispersion within -13 and +11 ps/(nm·km) over 2000-nm-wide bandwidth with three zero dispersion wavelengths is achieved. The impacts of the structural parameters are analyzed in detail and the phase-matching condition in four-wave mixing process is investigated as well. A 3-dB conversion bandwidth of 1200 nm and -28-dB conversion efficiency are predicted in a 1-cm-long horizontal dual-slot AlN waveguide with the pump power of 2 W.

Original languageEnglish
Article number7953499
JournalIEEE Photonics Journal
Volume9
Issue number4
DOIs
StatePublished - Aug 2017
Externally publishedYes

Keywords

  • Waveguides
  • nonlinear optical effects in semiconductors

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