title: [The effective dielectric function of porous SiO2 glass].
abstract: In this paper, we discussed the effective dielectric function of porous SiO2 glass with pore size 7.5 nm. We briefly discussed different formulae proposed by different theoretical models of porous systems, and compared the relationship of effective dielectric functions changing with different porosity of porous SiO2 of each formula. Through comparing the experimental spectra and the theoretical spectra of each formula, we found the equation ln epsilon e = theta 1 ln epsilon 1 + theta 2 + theta 2 ln epsilon 2 best indicates the effective dielectric function of porous SiO2. This work is helpful in selecting special absorption materials.
authors.affiliation: Laser Single Atom Detection Laboratory, Department of Modern Applied Physics, Tsinghua University, 100084 Beijing.
authors.forename: Q
authors.initials: Q
authors.lastname: Peng
authors.forename: C
authors.initials: C
authors.lastname: Tu
authors.forename: S
authors.initials: S
authors.lastname: Dai
authors.forename: B
authors.initials: B
authors.lastname: Xu
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: G
authors.initials: G
authors.lastname: Zhang