Abstract

The TiO2:Sm3+ inverse opal has been prepared by a template-assisted method, and its modification on photoluminescent (PL) properties of Sm3+ is studied. Transmittance spectra show a dip within the photonic bandgap, whose location shifts a little to red and then to blue with an increasing detection angle between the incident light and the surface normal; such an irregular shift is attributed to uneven shrinkage of lattices. Steady-state PL spectra indicate a spatial redistribution of emission lines. Decay kinetics demonstrate that the spontaneous emission rates of Sm3+ ions in the inverse opal decrease to varied extent depending on the emission wavelength and detection angle. All the facts are examined to be consistent with the photonic bandgap effect.

© 2010 Optical Society of America

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