Photoluminescence and photodarkening effect in erbium-doped chalcogenide glassy films

Effect of proton irradiation on electrical properties of a-As2S3

“…These include subtle effects such as shifts in the absorption edge (photobleaching and photodarkening), and more substantial atomic and molecular reconfiguration such as photoinduced refractive index changes and photodoping effects [7]. In general, these phenomena are associated with the changes in the optical constants [8] and absorption edge shift [9], allowing the use of these materials in the fabrication of a large number of optical devices. Since change in the structure can have an influence on photogeneration, charge carriers transport, charge carrier trapping and other important fundamental properties.…”

“…Arsenic sulphide glasses are largely studied materials, mainly due to their unique light induced effects [8,9]. Changes in physical properties of a-As 2 S 3 induced by high power radiations (electrons, x-ray, gamma ray etc.)…”

Crystallization behavior of e-beam evaporated Ga5Ge15Te80 thin films

“…The crystallization of the amorphous material into a single phase is the foremost requirement among them so that the material can qualify as a direct overwrites media [2][3][4][5]. The other material requirements include low melting point, high activation energy of crystallization, high absorption at the writing wavelength, a high optical contrast at the reading wavelength and stability of the optical properties under normal environmental conditions.…”

Optical Properties of As36Te42Ge10Si12Thin Films

“…In the recent years, considerable attention has been focused on these materials (glasses), due to their threshold and memory switching effects and the infrared transmission of many of these glasses which make them potential materials of industrial applications in memory devices, fiber optics, guided wave devices and infrared telecommunication systems [1][2][3][4][5][6][7][8][9][10]. When these glasses are irradiated with high energy particles or light, bond breaking and bond rearrangement can take place, which result in the change in local structure of the glassy materials, which leads to changes in the optical constants [11,12] and absorption edge shift [13], which make these materials suitable for the fabrication of the large number of optical devices. Thus, the estimation of the optical parameters of chalcogenide glasses is obviously necessary in order to know the basic mechanism underlying these phenomena, and also to exploit and develop their technological applications.…”