Photosensitive Glass and Glass-Ceramics

Nicholas F. Borrelli presently is in a position as a corporate research fellow in the research division of Corning Incorporated located in Corning NY.

1) Introduction. Bit of history. Technical Relevance. Scope. 2) Basic photosensitive mechanism. 2.1) Initial chemistry. 2.2) Metal ions. 2.3) Origin of color. 3) Other phases produced photosensitively. 3.1) Basic mechanism for photo- nucleation of other glass-ceramic phases 3.11) Li-metasilicate (Fotoform™) 3.111) Photo-machinable 3.112) Spherical lens arrays (SMILE™). 3.12) NaF (Fota-Lite™) 3.121 Colored 3.13) NaF (Polychromatic™) 3.131) mechanism of controlled color 3.14) AgCl (Rainbow) 3.141) Mechanism of thermal formation 3.142) photo-induced effects) 3.15) Li-aluminosilicate (Nepheline) 3.151) example of double nucleation phenomenon 4) Photorefractive Effects (induced refractive index) 4.1) NaF-based 4.11) Holograms 4.12) Gradient index lenses 4.2) Photorefractive and polarizing 4.21 Photorefraction (see 3.142) 4.22) polarizing mechanism 4.3) Fs-laser induced 4.31) waveguides 4.32) gratings 4.4) Bulk Fiber Bragg Grating SiO2/GeO2+ H2 5) Photo-adaption 5.1) definition and description of the various manifestations 5.11) photo-induced color 5.12 photo-induced polarization 6) Solarization 6.1) Different Mechanisms 6.2) Extent of effect in different glasses 6.3) Bleaching effects 7) Photochemistry in porous Vycor™ 7.1) description and preparation of porous glass 7.2) photo-produced effect with the aid of organo-metallic impregnation