TY - JOUR
T1 - Preparation and optical properties of titania-doped hybrid polymer via anhydrous sol-gel process
AU - Luo, Xinshi
AU - Zha, Congji
AU - Luther-Davies, Barry
PY - 2005/1/1
Y1 - 2005/1/1
N2 - Incorporation of metal alkoxides (Ti, Zr, etc.) for tuning the optical properties of silica glasses by the sol-gel process is of significant interest for optical applications. In this paper, we report an anhydrous sol-gel process for preparation of photosensitive titania-doped hybrid glassy polymer with good homogeneity and high doping concentration (TiO2 up to 40mol%). The process consists of two steps: in the first step methacryloxypropyltrimethoxysilane (MPS) is hydrolyzed by boric acid through ligand exchange reaction (OH ↔ OR) under anhydrous conditions; and in the second step dimethyldimethoxysilane (DMDMS), diphenyldimethoxysilane (DPhDMS) and titanium ethoxide (TET) were added to condense with the silanols formed in the first step. The optical properties of the synthesized hybrid polymer were studied, and results showed that the hybrid material has low OH absorption, low optical losses (0.45dB/cm at 1550nm and 0.16dB/cm at 1310nm respectively), and good thermo-optical linearity with tuneable refractive index. The effect of TiO2 doping in reducing the OH concentration of the hybrid material was observed, and the mechanism for this effect is discussed.
AB - Incorporation of metal alkoxides (Ti, Zr, etc.) for tuning the optical properties of silica glasses by the sol-gel process is of significant interest for optical applications. In this paper, we report an anhydrous sol-gel process for preparation of photosensitive titania-doped hybrid glassy polymer with good homogeneity and high doping concentration (TiO2 up to 40mol%). The process consists of two steps: in the first step methacryloxypropyltrimethoxysilane (MPS) is hydrolyzed by boric acid through ligand exchange reaction (OH ↔ OR) under anhydrous conditions; and in the second step dimethyldimethoxysilane (DMDMS), diphenyldimethoxysilane (DPhDMS) and titanium ethoxide (TET) were added to condense with the silanols formed in the first step. The optical properties of the synthesized hybrid polymer were studied, and results showed that the hybrid material has low OH absorption, low optical losses (0.45dB/cm at 1550nm and 0.16dB/cm at 1310nm respectively), and good thermo-optical linearity with tuneable refractive index. The effect of TiO2 doping in reducing the OH concentration of the hybrid material was observed, and the mechanism for this effect is discussed.
UR - http://www.scopus.com/inward/record.url?scp=10644235525&partnerID=8YFLogxK
U2 - 10.1016/j.jnoncrysol.2004.09.001
DO - 10.1016/j.jnoncrysol.2004.09.001
M3 - Article
SN - 0022-3093
VL - 351
SP - 29
EP - 34
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
IS - 1
ER -