Highly luminescent garnets for magneto-optical photonic crystals

被引：14
作者：
Grishin, A. M. [1 ]
Khartsev, S. I. [1 ]
机构：
[1] Royal Inst Technol, Dept Condensed Matter Phys, SE-16440 Stockholm, Sweden
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 10期
基金：
瑞典研究理事会;
关键词：
Bragg gratings; epitaxial layers; erbium; Faraday effect; gadolinium compounds; garnets; lanthanum compounds; microcavities; mirrors; photoluminescence; photonic crystals; yttrium compounds;
D O I：
10.1063/1.3224204
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：3
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