Measurement ofOptical Properties of Construction Materials intheTerahertz Region

Refractive indices, attenuation coefficients andreflectance ofconstruction materials including gypsum boardsandrockwoolceiling plates aredetermined inthe terahertz region withtimedomainspectroscopy (TDS).The measurement showscareful consideration needstousethese constants formodeling ofTHz indoor-application systems becausetheconstruction materials areinhomogeneous and randommedia. I. INTRODUCTION Measurement ofoptical characteristics ofconstruction materials isnecessary fordeveloping indoor terahertz sensing systems, forexample, usedbyrescue corpsin collapsed and/or burning buildings. Theindoor THzshort- range high-speed wireless communication system isanother important application (1).So farelectromagnetic characteristics inmillimeter at62GHzand70GHz(2)and terahertz wavesbelow0.35THz(3)aremeasured forplaster, glass plates andother fewmaterials. Ourresearch presents optical constants ofcommercial construction materials at higher terahertz frequencies.