A Novel Multi-Channel Photonic Crystal Waveguide Biosensor

In this paper, we propose a two-dimensional photonic crystal multi-channel biosensor. This biosensor is implemented by a waveguide and some cavities which has the capability ofhighly parallel operation due to special architecture. The architecture is obtained by lattice shift of single hole around thecavities. Each channel has different resonant cavity and filling analyte to selected hole causes independently shift in resonant wavelength. Also, this biosensor has high sensitivity and quality factor. The waveguide and cavities are respectively created by omitting a raw of water holes and one hole, respectively. Thisbiosensor is consisted from hexagonal lattice of water holes in silicon on insulator slab. Trapping DNA molecules and proteinwithin the selected hole, causes spectral shift in the output terminal. The plane wave expansion (PWE) and finite differencetime domain (FDTD) method are chosen to perform simulation

Keywords:

photonic crystal , multi-channel biosensor , waveguide , DNA molecule