Spectral Characterization Of Two-dimensional Photonic Crystal Biosensor

In recent years, the theoretical research, structure design and applicationtechnology of optical devices which based photonic crystal (PC) have become a hotresearch topic in the field of photoelectron. Especially with the development of thenanotechnology and photoelectric conversion devices, PC gets lots of chance in thefield of bio-sensor. Therefore, the theory research method and optical properties of PCwas extremely important for the applications of photonic crystal biosensors. In thisdissertation, the optical characteristics of two-dimensional MgF2PC was analyzed.First, the physical mechanism of basic characteristics of PC was theoreticallyanalyzed based on maxwell equation. Theoretical analysis method of PC wasintroduced, the detailed analysis of finite-difference time-domain method and planwave expansion method was presented, and the advantages and disadvantages of thetwo methods was generalization.Second, the rigorous coupled-wave analysis was employed to establish thestructure model of two-dimensional photonic crystal. And based on this, the effect ofthickness, refractive index and lattice-periodical of the waveguide on band propertiesof two-dimensional photonic crystal has been deeply studied.Finally, a MgF2PC biosensor which was based on spectral imaging technologywas proposed, the structure parameters of two-dimensional PC biosensor, meanwhile,the spectral characterization of uniform and non-uniform media adsorbed on thesurface of photonic crystal has been studied. The results demonstrated that thedistribution properties of media adsorbed on the surface of photonic crystal can beobtained according to the spectral imaging characteristics of photonic crystal, and thisstudy strongly supported the theoretical evidence of fabrication of photonic crystalbiosensor.