Sielectric Properties of Terahertz Windows Materials for Bio-sample Measurement

We presented the dielectric properties of three materials for bio-sample measurement using THz transmission spectroscopy.The materials,PE,COC and PVDF,have sufficient transmittance.The results demonstrate that PVDF membranes are suitable media for THz transmission spectrum above 0.3 THz.However,it is not property to measure the solution sample because of the water existed after active processing by ethanol.In this paper,the refractive index,the absorption coefficient,and the complex dielectric functions in the THz region are compared for each material.From the measured dielectric properties,the loss mechanism of THz radiation for each material is also discussed.

We presented the dielectric properties of three m aterials for bio-sample measurem entusing TH z transmission spectroscopy. The m aterials , PE, COC and PV D F, have sufficient transmittance. The results demonstrate that PVDF membranes are suitablemedia for TH z transmission spectrum above 0.3 TH 7. However, it is not property m easure the solution sam pie because of the water existed afar active processng by ethanol. In this paper, the refractive hdex, the absorption coefficient, and the corn plex dieieccric functions in the THz region are compared for each material. From the measured dielectric properties, the loss m ethanism of TH z tadiation for each material is also discussed.