Computational study of slot photonic crystal ring-resonator for refractive index sensing

Fu Li Hsiao, Yu Ting Ren

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We perform simulations of slot photonic crystal ring-resonators in dielectric media. The structure comprises two concentric photonic crystal ring waveguides. A slot of width of a few tens of nm is inserted between the inner and outer ring waveguides. By individually modifying the geometric parameters of inner and outer waveguides, the ring-resonator structure generates slow-light whispering-gallery resonance with an optical field concentrating within the slot area. As a sensing element, the structure exhibits advantages of both slow-light and ring-resonator devices. The estimated sensitivity is about 250 nm/refractive index unit and the minimum detectable refractive index variation is about 0.008.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalSensors and Actuators, A: Physical
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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