Measuring absorption coefficient of excised animal skin exposed to THz radiation

摘要

By employing a FTIR spectrometer aligned for THz beam in the Australian Synchrotron, we measured absorptioncoefficients of different toad skin patches. Skin samples were precisely carefully from cane toads and prepared forexperiments in dried and fresh states. The transmission and attenuated total reflection modes were designated tomeasure absorption coefficients through mathematical relations between transmittance and absorption.The transmission study shows that in the frequency range of 0.8 to around 3 THz the dark part of toad skindemonstrates higher absorption than the pale skin in both dried and fresh states while it is reversed at higherfrequencies. Both dark and pale skin patches perform much less absorption than distilled water. ATR data is inaccordance with the frequency range of 0.75 to 0.95 THz.