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Highly luminescent garnets for magneto-optical photonic crystals
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.
KTH, School of Information and Communication Technology (ICT), Material Physics, Material Physics, MF.ORCID iD: 0000-0001-8774-9302
2009 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 95, no 10Article in journal (Refereed) Published
Abstract [en]

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
Keyword [en]
Bragg gratings, epitaxial layers, erbium, Faraday effect, gadolinium, compounds, garnets, lanthanum compounds, microcavities, mirrors, photoluminescence, photonic crystals, yttrium compounds, fiber amplifier
Identifiers
URN: urn:nbn:se:kth:diva-18749DOI: 10.1063/1.3224204ISI: 000269723500037Scopus ID: 2-s2.0-70249089987OAI: oai:DiVA.org:kth-18749DiVA: diva2:336796
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Khartsev, Sergiy

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