Photonic bandgap effects in reflectance and photoluminescence of silica opal-based photonic crystal with embedded europium (III) salt of ethylenediaminetetraacetic acid (HEuEDTA) were studied. The position of the bandgap was accurately fitted to the wavelengths of visible lines of Eu3+ photoluminescence by proper choice of the size of SiO2 spheres. High spatial anisotropy of photoluminescence was observed by spatially- and spectrally-resolved laser spectroscopic measurement. The influence of crystal structure quality on spatial anisotropy of photonic bandgap and photoluminescence is discussed.
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