Numerical simulation of a novel sensing approach based on abnormal blocking by periodic grating strips near the silicon wire waveguide

Andrei Tsarev, Eugeny Kolosovsky, Francesco de Leonardis, Vittorio M.N. Passaro

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper discusses the physical nature and the numerical modeling of a novel approach of periodic structures for applications as photonic sensors. The sensing is based on the high sensitivity to the cover index change of the notch wavelength. This sensitivity is due to the effect of abnormal blocking of the guided wave propagating along the silicon wire with periodic strips overhead it through the silica buffer. The structure sensing is numerically modeled by 2D and 3D finite difference time domain (FDTD) method, taking into account the waveguide dispersion. The modeling of the long structures (more than 1000 strips) is accomplished by the 2D method of lines (MoL) with a maximal implementation of the analytical feature of the method. It is proved that the effect of abnormal blocking could be used for the construction of novel types of optical sensors.

Original languageEnglish
Article number1707
Number of pages18
JournalSensors
Volume18
Issue number6
DOIs
Publication statusPublished - 25 May 2018

Keywords

  • Diffraction
  • Optical sensors
  • Segmented gratings
  • Silicon and compounds
  • ASSISTED COUPLERS
  • RING-RESONATOR
  • DESIGN
  • FILTER
  • diffraction
  • ON-INSULATOR
  • optical sensors
  • DIRECTIONAL-COUPLERS
  • LINES
  • EFFECTIVE-INDEX METHOD
  • segmented gratings
  • silicon and compounds

Fingerprint Dive into the research topics of 'Numerical simulation of a novel sensing approach based on abnormal blocking by periodic grating strips near the silicon wire waveguide'. Together they form a unique fingerprint.

Cite this