Post-glass melting synthesis and photochromic properties of composite AgCl-AgPO3 glasses

Postmelting Encapsulation of Glass Microwires for Multipath Light Waveguiding within Phosphate Glasses

“…It is known that the metaphosphate network consists mainly of chains upon connecting phosphate tetrahedral units with bridging and nonbridging (terminal) oxygen atoms. 24,26 The obtained two main Raman features of Figure 5b originate from these structural units. Indeed, the key band at 1140 cm −1 is attributed to the symmetric stretching vibration of the terminal PO 2 − groups, whereas the broader band at 675 cm −1 arises from the symmetric stretching of the P−O−P bridges of the phosphate backbone.…”

“…Indeed, the key band at 1140 cm −1 is attributed to the symmetric stretching vibration of the terminal PO 2 − groups, whereas the broader band at 675 cm −1 arises from the symmetric stretching of the P−O−P bridges of the phosphate backbone. 24,26 The relative intensities of the two bands provides direct evidence on the population of the phosphate entities, and thus, on the phosphate network modifications. However, the analysis of Figure 5b reveals no significant changes in the relative intensities of the Raman features between splat-quenched glasses and drawn MWs.…”

“…Namely, the binary silver phosphate glass (AgPO 3 ) with x = 0 was employed as the host waveguide glass, whereas the silver iodide phosphate glass with x = 0.3 was used for the MWs drawing. Both glasses were prepared by melting appropriate amounts of AgI, AgNO 3 , and NH 4 H 2 PO 4 dry powders within an electrical furnace upon following a typical procedure described explicitly in our previous works. − AgPO 3 glasses were obtained in the form of rectangular prism blocks of various top area dimensions (0.5 × 1 cm 2 and 1 × 1 cm 2 ), after casting the melt inside custom-made molds. For improving the optical quality of the upper surface, the glasses were stamped with an optically polished silicon wafer.…”

“…In recent studies we have shown the excellent feasibility of a postmelting encapsulation procedure toward the development of ultrastable and highly luminescent perovskite glasses, 24 This article is licensed under CC-BY 4 composite two-dimensional (2D) materials glass nanoheterojunctions, 25 and superior photochromic glasses. 26 Herein we exploit the postmelting protocol for the development of advanced all-glass waveguides without the need for laser processing or chemical procedures. In particular silver iodide phosphate glass microwires (MWs) are drawn from typical splat-quenched samples.…”

“…Phosphate glasses are chosen due to their soft nature as expressed by their low glass transition temperature ( T g ), i.e. ranging below 200 °C. − Following the drawing, the glass MWs are incorporated in a controlled manner within previously prepared transparent silver phosphate glass rectangular prisms. Notably, the MWs glass exhibits a higher refractive index than the host glass, allowing the controlled light propagation within the waveguide devices by means of total internal reflection (TIR) principles.…”