Ever since the anomalous contribution to the specific heat of silica glass below 1 K was reported, extensive experimental efforts have been devoted to understand the dynamical properties of disordered solids. Although the observed phenomena seem to be consistent with the theoretical model based on the existence of two-level system’s(TLS’s), the microscopic nature of TLS’s is not yet understood. In our attempt to gain further insight into the structures and dynamical properties of amorphous solids at low temperatures, we tried to introduce photosensitive functional “organic dye molecules” into the “inorganic silica glass matrix” and to probe the amorphous structure by the photochemical hole burning(PHB) spectroscopy.
Amorphous Silica Burning Time Hole Spectrum Molecular Dispersion Anomalous Contribution
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