Terahertz Time-Domain Spectroscopy and Low-Temperature Specific Heat Investigation of Vitreous Glucose*

The boson peak is a low energy excitation universally observed in the THz region of the amorphous materials. The boson peak of infrared spectra appears in the spectra of α(ν)/ν² [α(ν) is the absorption coefficient]. In this study, we performed terahertz time-domain spectroscopy on glassy glucose to investigate the boson peak dynamics. Moreover, we determined infrared light-vibration coupling coefficient using the α(ν) and vibrational density of states obtained from the low-temperature specific heat measurement.