Heteroepitaxial Bi3Fe5O12/La3Ga5O12 films for magneto-optical photonic crystals
2005 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 86, no 14Article in journal (Refereed) Published
Epitaxial La3Ga5O12 (LGG) garnet films and Bi3Fe5O12/La3Ga5O12 (BIG/LGG) heteroepitaxial film structures have been synthesized on the Gd3Ga5O12(GGG,111) single crystal. LGG films were grown by pulsed laser deposition technique whereas rf-magnetron sputtering was used to grow BIG films. LGG has a lattice constant 12.768 A that is bigger than that in GGG (12.384 A) and closer to that in BIG (12.626 A). We demonstrate feasibility of integration lanthanum gallium garnet with a giant Faraday rotator Bi3Fe5O12 in magneto-optical photonic crystals. Heteroepitaxial Bi3Fe5O12(1.9 mu m)/La3Ga5O12(300 nm)/GGG(111) structures show Faraday rotation as high as 5.74 deg/mu m compared to 5.46 deg/mu m in BIG/GGG at lambda=655 nm. Fitting LGG reflectivity spectra to Fresnel formulas yields LGG refractive index n(o)=1.981 compared to 1.963 in GGG at 655 nm. Dispersion of LGG refraction index follows Sellmeier formula n(o)(2)=1+2.77/[1-(143 nm/lambda)(2)] in the range from 400 nm to 1000 nm.
Place, publisher, year, edition, pages
2005. Vol. 86, no 14
dimensional magnetophotonic crystals
IdentifiersURN: urn:nbn:se:kth:diva-14661DOI: 10.1063/1.1897077ISI: 000228242700008ScopusID: 2-s2.0-17444387408OAI: oai:DiVA.org:kth-14661DiVA: diva2:332702
QC 201005252010-08-052010-08-05Bibliographically approved