Planar Photonic Crystals Biosensor Applications of TiO2

Erdiven U., Karaaslan M., Unal E., KARADAĞ F.

ACTA PHYSICA POLONICA A, vol.122, no.4, pp.732-736, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 122 Issue: 4
  • Publication Date: 2012
  • Doi Number: 10.12693/aphyspola.122.732
  • Title of Journal : ACTA PHYSICA POLONICA A
  • Page Numbers: pp.732-736


We examine quality factor and sensitivity change depending on the resonant wavelength changing refractive index of surrounding liquid for TiO2 photonic crystal slab structure. Photonic crystal slab structure is used widely for biological materials such as proteins, antigens, DNA, cells, virus particles and bacteria. Mentioned photonic crystal slabs are usable with large-area biosensor designs. They permit direct access to externally incident optical beams in a microfluidic device. Model calculations are based on two-dimensional periodic crystal structure. Photonic crystal slab consists of a square lattice of air holes in a finite-thickness dielectric slab. The time domain simulations were implemented by software MIT Electromagnetic Equation Propagation.