Anomalous birefringence and glass structure

Interfacial Energy in Phase‐Separated Glasses from Emulsion Rheology

“…It was shown that a deformable secondary phase that is dispersed in a glass can be elongated to a large extent and that, on the other hand, relaxation and spheroidization occurs upon annealing. Phase separated glasses were found to exhibit an optical anisotropy when cooled from above their transformation temperature T g under mechanical loading 3,4 . Anisotropy in glasses caused by oriented particles of anisotropic shape was attributed as form anisotropy , 5 in contrast to distribution anisotropy and structural anisotropy , respectively 6,7 .…”

“…Phase separated glasses were found to exhibit an optical anisotropy when cooled from above their transformation temperature T g under mechanical loading. 3,4 Anisotropy in glasses caused by oriented particles of anisotropic shape was attributed as form anisotropy, 5 in contrast to distribution anisotropy and structural anisotropy, respectively. 6,7 Since the mid-1970s, there has been a rising interest in deforming phase separated photochromic particles in a host glass matrix, e.g.…”

Effect of infiltration pressure on the birefringent properties of a side-hole fiber filled with indium

“…The decrease in the birefringence was linear in low temperatures and became saturated to the similar value of ∼8.10 × 10 −5 from the temperatures of 60°C to 80°C. We carefully guess that this unusual saturation can result from the anomalous birefringent property of the fiber that cooled down under the high stress [17] or from the limitation in the thermal expansion of indium restricted by the rigid fiber material at a certain boundary state. The temperature sensitivities of the birefringence were derived by fitting the linear regions in low temperatures.…”