Hierarchically Structured Optical Materials

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Hierarchically Structured Optical Materials

• modulation of photophysical properties
• molecular alignment, anisotropy
• dynamic responses

2 mm
Hexagonal silica/EO20-PO70-EO20 with 1 Rhodamine
6G
2
Refractive Index Control Waveguiding
and Amplification
n
waveguides 1.43
mesoporous SiO2 1.15
10 kWcm-2
silicon 3.5
0.8 kWcm-2
P. Yang et al., Science, 282, 2244 (1998)
P. Yang et al., Science, 287, 465 (2000)
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Dynamic Optical Responses in Mesostructured
Materials
G. Wirnsberger et al., Chem. Comm., 119 (2001)
G. Wirnsberger et al., Adv. Mater. 12, 1450
(2000)
Photochromism
Dynamic Response
O
h?1
or heat

h?2
N
N
O
2
O
h?1
or heat
N
N
N
O
N
h?2
4
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SilicateinNatures Structure-Directing Catalyst
Polymerizes Silica, Methyl- and
Phenyl-silsesquioxanes