TY - JOUR
TI - The spectral radiative effect of Si/SiO2 substrate on monolayer aluminum porous microstructure
AU - Yu Haiyan
AU - Zhang Haochun
AU - Su Chengshuai
AU - Wang Kexin
AU - Jin Liang
JN - Thermal Science
PY - 2018
VL - 22
IS - 12
SP - 629
EP - 638
PT - Article
AB - In this work, we have investigated theoretically the spectral radiative  properties of a monolayer aluminum porous microstructure, including  wavelength-selective transmission, reflection, and absorption. The  Finite-Difference Time-Domain (FDTD) method for electromagnetics has been  used to calculate the spectral radiative properties of the monolayer  aluminum porous microstructure. It is found that the absorption spectra of  the aluminum porous microstructure will generate two peaks within the  wavelength ranging from 1.0 to 15.0 μm at normal incidence of light. Then  the surface plasma polarition (SPP) resonance could be observed clearly in  the obtained results of this work, especially on the top surface near the  orifice. Inside the porous structure, magnetic polariton (MP) is the crucial  mechanism to elucidate for the power absorption enhancement. Furthermore,  the absorption capacity of the aluminum porous structure with Si/SiO2  substrate has been analyzed, to explain the influence of base on the  monolayer porous material. The findings indicate that the absorptance peak  at 3μm incident wavelength significantly improved with silicon substrate,  while that of silica substrate has little difference with aluminum porous  plate. The silicon and silica bases disrupted the distribution of the  electromagnetic fields of the original aluminum porous structure, and form a  new magnetic field within the subbases. Meanwhile the internal microcavity  polarition of the porous structure has enhanced obviously near the bases.