关键词: 光电子学, 磁流体光子晶体, 传输矩阵法, 缺陷模, 品质因子

Abstract:

The effective dielectric constant of magnetic fluid is related to the volume fraction P of the magnetic nanoparticles and the factor of magnetic field. Firstly, in this paper, the changing relation of water-based MnFe2O4 nanoparticle magnetic fluid effective refractive index as the changing of which are the volume fraction of the magnetic nanoparticles and the factor of magnetic field is caculated. It is found that though the factor of magnetic field is adjusted. To realize the magnetic fluid has the same effective refractive index in difference of volume fraction of the magnetic nanoparticles. And then, the transmission spectrum of doping one-dimensional water-based MnFe2O4 magnetic fluid photonic crystal, the volume fraction of the magnetic nanoparticles is 0.745 and the structure is (AB)8C(BA)8, is numerically simulated by transfer matrix method. The results indicate that the wavelength of defect mode shifts to the side of long waves as the increased of nanoparticle magnetic fluid effective refractive index. That is, the wavelength of defect modes increased as the effective refractive index of magnetic fluid increasing. The amount of redshift is 36.6nm. At last, the quality factor of defect mode is disscused. We found out that half the peak bandwidth is a constant. The quality factor of defect mode and the wavelength of defect mode have the same characteristics of linear with the change of the effective refractive index of magnetic fluid. That is, the quality factor of the defect mode increased as the effective refractive index of magnetic fluid increasing.

Key words: optoelectronics; nanoparticle magnetic fluid photonic crystals; transfer matrix method; the defect mode; the quality factor