T-shaped dielectric slot waveguides for efficient control of birefringence and polarization independent directional coupling

Yusheng Bian, Zheng Zheng, Xin Zhao, Yalin Su, Lei Liu, Jiansheng Liu, Jinsong Zhu, Tao Zhou

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A novel dielectric slot waveguide supporting strongly confined field in a T-shaped low-index slot region for both TE and TM polarizations is proposed and analyzed. Numerical simulations have demonstrated that quite different birefringent modal properties are achievable with tight optical confinement in the slot by tuning key geometrical parameters of the waveguide. Based on such a slot structure, the characteristics of directional couplers are investigated and the conditions for polarization independent coupling are also given. The presented T-shaped slot waveguide might be employed in integrated photonic systems as important building blocks enabling a number of potential applications.

Original languageEnglish (US)
Pages (from-to)5118-5121
Number of pages4
JournalOptics Communications
Volume285
Issue number24
DOIs
StatePublished - Nov 1 2012

All Science Journal Classification (ASJC) codes

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

Keywords

  • Birefringence
  • Directional coupler
  • Nanostructures
  • Slot waveguide

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