Abstract
Three-dimensional (3D) Ta2O5/SiO2 photonic crystals in the visible-violet spectral region are fabricated by an auto-cloning techniqueon patterned substrates with triangular lattice configurations and their in-plane (the stackXY plane) optical properties are studied. Reflection measurements by normal incidence of lighton to the cleaved facet of the photonic crystal reveal maximum reflections at certainphoton energies. Comparison with calculated band structure demonstrates that thereflection peaks are either due to the photonic bandgap (PBG) within which the lightpropagation is forbidden, or due to heavy photons associated with flat bands. A two-stepdeposition method is adopted to insert luminescent rhodamine 590 into the photoniccrystal and the emission property is strongly modified by the photonic crystal. Possibleapplications of such 3D photonic crystals in optical components are discussed.
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