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

Dae Kue Hwang, Heeso Noh, Hui Cao, Robert P.H. Chang

Research output: Contribution to journalArticle

28 Citations (Scopus)


We have self-assembled photonic crystal with a multistack structure using same size of spheres but from materials with different refractive indices. Al2 O3, ZnO, and TiO2 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.

Original languageEnglish
Article number091101
JournalApplied Physics Letters
Issue number9
Publication statusPublished - Sep 14 2009


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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