Ultracompact 2 × 2 photonic crystal waveguide power splitter based on self-imaging effect realized by asymmetric interference

Tian Bao Yu, Qi Jie Wang, Jun Zhang, Jian Yi Yang, Siu Fung Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)


The properties of two-fold images, based on asymmetric interference in multimode interference-based photonic crystal waveguides, are numerically studied with finite-difference time-domain simulations. With these image properties, 2 × 2 power splitters (PSs) with an ultracompact size are designed. Arbitrary splitting ratio can be achieved by modifying the sizes (the effective refractive indices) of one pair of rods in the multimode region. As an example, a 3-dB 2 × 2 PS with a size of 24 × 8 μm2is presented with an output efficiency as high as 98%. The method can be extended for the design of M × N PSs for photonic integrated circuits applications.
Original languageEnglish
Article number5766712
Pages (from-to)1151-1153
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number16
Publication statusPublished - 3 Aug 2011


  • Integrated photonics
  • multimode interference
  • photonic crystal waveguides
  • power splitter (PS)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this