Photonic bandgap engineering with inverse opal multistacks of different refractive index contrasts

We have self-assembled photonic crystal with a multistack structure using same size of spheres but from materials with different refractive indices. Al 2 O 3 , ZnO, and TiO 2 are infiltrated into opal templates by atomic layer deposition. Stacking multiple inverse opal structures with different refr...

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Bibliographic Details
Published in:Applied physics letters 2009-08, Vol.95 (9), p.091101-091101-3
Main Authors: Hwang, Dae-Kue, Noh, Heeso, Cao, Hui, Chang, Robert P. H.
Format: Article
Language:English
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Summary:We have self-assembled photonic crystal with a multistack structure using same size of spheres but from materials with different refractive indices. Al 2 O 3 , ZnO, and TiO 2 are infiltrated into opal templates by atomic layer deposition. Stacking multiple inverse opal structures with different refractive index contrasts broadens the reflection bands dramatically. Numerical simulations with plane wave expansion method show good agreement with experimental results.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3216582