APPLICATIONS OF MAGNETIC GARNET-FILMS IN INTEGRATED-OPTICS

Autor(en): DOTSCH, H
HERTEL, P
LUHRMANN, B
SURE, S
WINKLER, HP
YE, M
Stichwörter: Engineering; Engineering, Electrical & Electronic; MAGNETOSTATIC WAVES; Physics; Physics, Applied; WAVE-GUIDE ISOLATORS
Erscheinungsdatum: 1992
Herausgeber: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Journal: IEEE TRANSACTIONS ON MAGNETICS
Volumen: 28
Ausgabe: 5, 2
Startseite: 2979
Seitenende: 2984
Zusammenfassung: 
A new type of optical waveguide isolator is proposed. It relies only on the TM0 mode propagating in a strip waveguide which is divided by a compensation wall. The intensity distribution is different for forward and backward propagation. The backward mode can thus be eliminated by localized optical absorption. Detailed calculations exhibit the required geometry and material parameters. Furthermore, it is demonstrated that optical modulators can be realized using dynamical mode conversion induced by ferrimagnetic, domain, and domain lattice resonances. Dynamical conversion efficiencies of 10% at frequencies up to 3 GHz are measured. The additional optical absorption caused by impurities incorporated into the garnet films during the epitaxial growth process can be reduced considerably by controlling the growth parameters, or by annealing treatments. Absorption constants of 0.2 cm-1 at 1.3-mu-m wavelength have been achieved.
Beschreibung: 
1992 INTERNATIONAL MAGNETICS CONF ( INTERMAG 92 ) - MAGNETIC RECORDING HEADS : INDUCTIVE THIN FILM AND LAMINATED, ST LOUIS, MO, APR 13-16, 1992
ISSN: 00189464
DOI: 10.1109/20.179691

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