Highly luminescent garnets for magneto-optical photonic crystals
2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 95, no 10Article in journal (Refereed) Published
We compare luminescent properties of several Er-doped garnets as building blocks in all-garnet heteroepitaxial magneto-optical photonic crystals. Pulsed laser deposited La3Ga5O12, Gd3Ga5O12, Y3Fe5O12, and rf-magnetron sputtered Bi3Fe5O12 were chosen to host Er3+ ions on dodecahedral lattice sites. Er substituents with the concentration of 0.5 at. % (0.1 garnet formula units) do not decrease giant Faraday rotation in Bi2.9Er0.1Fe5O12 garnet; meanwhile providing intense room temperature C-band photoluminescence (PL). Fe3+ ion works as a sensitizer for Er resulting in fivefold PL enhancement in iron garnets compared to gallium ones. PL lifetime in gallium garnets is in millisecond range reaching almost 6 ms in Gd2.9Er0.1Ga5O12. We conclude Er substitution in gallium and iron garnet layers used both as Bragg mirrors and microcavities promises magneto-optical photonic crystals to become an active lasing medium.
Place, publisher, year, edition, pages
2009. Vol. 95, no 10
Bragg gratings, epitaxial layers, erbium, Faraday effect, gadolinium, compounds, garnets, lanthanum compounds, microcavities, mirrors, photoluminescence, photonic crystals, yttrium compounds, fiber amplifier
IdentifiersURN: urn:nbn:se:kth:diva-18749DOI: 10.1063/1.3224204ISI: 000269723500037ScopusID: 2-s2.0-70249089987OAI: oai:DiVA.org:kth-18749DiVA: diva2:336796
QC 201005252010-08-052010-08-052010-12-22Bibliographically approved