Enhanced photoluminescence in [Er2O3/TiO2]m photonic crystals
2009 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 105, no 11, 113122- p.Article in journal (Refereed) Published
We survey optical properties of [Er2O3/TiO 2]6/Er2O32/[TiO 2/Er2O3]6 photonic crystals (PCs) pulsed laser deposited on to the glass substrates. The dispersion relations of refractive indexes and extinction coefficients of the constituent materials were obtained from the comparison of experimental and simulated transmission spectra of single layer Er2O3 and TiO2 reference films. Based on these data several PCs have been designed and grown to match stop band and cavity mode resonance at wavelengths close to the 523 nm Er 3+-ion Fraunhofer 4S3/2 absorption line. Precise control of chemical composition and uniform multilayer thickness enable achievement of superior optical performance of sintered PCs. Obtained dispersion relations were combined with the 2×2 transfer matrix formalism to compute PC transmittance that appeared to be in a good agreement with the experimental spectra. Pumping PCs with 514 nm light source we observed a strong photoluminescence (PL) at 1535 nm. In PC specially designed for the resonance wavelength λres =514 nm, C-band PL intensity experiences fivefold enhancement compared to a single layer Er2 O3 film of equivalent thickness.
Place, publisher, year, edition, pages
2009. Vol. 105, no 11, 113122- p.
Absorption lines, At-wavelength, Cavity mode, Chemical compositions, Constituent materials, Dispersion relations, Equivalent thickness, Experimental spectra, Extinction coefficients, Fraunhofer, Glass substrates, Optical performance, PL intensity, Precise control, Pulsed laser, Reference films, Resonance wavelengths, Simulated transmission spectra, Single layer, Stop-bands, TiO, Transfer matrixes
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-11132DOI: 10.1063/1.3143082ISI: 000267053200022ScopusID: 2-s2.0-67649544889OAI: oai:DiVA.org:kth-11132DiVA: diva2:236284
QC 201010082009-09-222009-09-222010-10-08Bibliographically approved