Optical coupling between a self-assembled microsphere grating and a rib waveguide

Tai C., Unal B., Wilkinson J. S., Ghanem M. A., Bartlett P. N.

Applied Physics Letters, vol.84, no.18, pp.3513-3515, 2004 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 84 Issue: 18
  • Publication Date: 2004
  • Doi Number: 10.1063/1.1739275
  • Journal Name: Applied Physics Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3513-3515
  • Istanbul Gelisim University Affiliated: No

Abstract

The fabrication of a linear array of self-assembled polystyrene microspheres side coupled to a rib waveguide was discussed. A side-coupled rib waveguide microsphere grating was demonstrated using a simple low-cost self-assembly process. It was shown that the optical coupling between the lateral evanescent field and the periodically perturbed effective refractive index alongside the waveguide results in a transmission stopband at the Bragg wavelength. It was predicted that with improved sphere diameter control and more uniform assembly, a deeper and narrower response will be achieved.