1. Hierarchically Structured Optical Materials Hexagonal silica/EO 20 -PO 70 -EO 20 with 1% Rhodamine 6G modulation of photophysical properties molecular alignment, anisotropy dynamic responses 2  m Low-loss waveguides

2. n silicon 3.5 mesoporous SiO 2 1.15 waveguides 1.43 Refractive Index Control Waveguiding and Amplification P. Yang et al., Science, 287, 465 (2000) P. Yang et al., Science, 282, 2244 (1998) above threshold 0.8 kWcm -2 10 kWcm -2

3. N NO 2 O N O N N O N N NO 2 O + h 1 or heat h 1 or heat h 2 exposure (365 nm) after ~2 sec after 15 min as-synthesized PhotochromismDynamic Response Dynamic Optical Responses in Mesostructured Materials G. Wirnsberger et al., Chem. Comm., 119 (2001) G. Wirnsberger et al., Adv. Mater. 12, 1450 (2000)

5. Silicatein Nature’s Structure-Directing Catalyst Polymerizes Silica, Methyl- and Phenyl-silsesquioxanes