Time-domain THz spectroscopy of the characteristics of hydroxyapatite provides a signature of heating in bone tissue - Fig 5

(a) Magnification of THZ-TDS spectra of bones and HA samples around the peak at 2.1 THz (dots) and fit with a Voigt peak profile on top of the background (lines). For ns-HA, only the experimental data are shown as lines; (b) evolution of the gaussian and lorentzian contributions to the Voigt profile for the heated bone samples (left), as well as aged sample and s-HA (right, as indicated along the x-axis.); (c) evolution of the peak frequency (left axis) and Voigt width (right axis).