Optimized nonreciprocal rib waveguides for integrated magneto-optic isolators
Autor(en): | Wallenhorst, M. Backherms, V. Josef, A. Bahlmann, N. Lohmeyer, M. Doetsch, H. Hertel, P. |
Stichwörter: | Calculations; Faraday effect; Film growth; Garnets; Liquid phase epitaxy; Magnetooptical devices; Mathematical models; Optical rotation; Optimization; Phase shift; Waveguide isolators, Faraday rotation; Gadolinium gallium garnet; Integrated magnetooptic isolator; Molecular field model; Nonreciprocal rib waveguide; Temperature dependence, Optical waveguides | Erscheinungsdatum: | 1998 | Herausgeber: | MRS, Warrendale | Enthalten in: | Materials Research Society Symposium - Proceedings | Band: | 517 | Startseite: | 463 | Seitenende: | 468 | Zusammenfassung: | Garnet films of composition (Lu,Bi)3(Fe,Ga,Al)5O12 and (Tm,Bi)3(Fe,Ga)5O12 are grown by liquid-phase epitaxy on [111]-oriented substrates of gadolinium gallium garnet. Ferrimagnetic films with positive or negative Faraday-rotation as well as paramagnetic films with negligible Faraday-rotation are produced by variations of the rare earth ion substitutions. The temperature dependence of Faraday-rotation is fitted with a molecular field model. Optical rib waveguides in single and double layer garnet films with different Faraday-rotations are realized. The nonreciprocal phase shift of the TM0-Mode is studied both theoretically and experimentally at a wavelength of 1.3 μm. Results show that the maximum nonreciprocal effect at room temperature of double layer films with opposite Faraday-rotation is 1.6 times as large as that of comparable single layer waveguides. But, because of the large temperature dependence of the Faraday-rotation of the positive rotating films, these waveguides show a large temperature dependence of the nonreciprocal phase shift. This problem can be avoided if the positive rotating layer is replaced by a paramagnetic layer. Agreement between calculations and measurements is excellent. |
Beschreibung: | Conference of Proceedings of the 1998 MRS Spring Symposium ; Conference Date: 13 April 1998 Through 15 April 1998; Conference Code:48894 |
ISSN: | 02729172 | DOI: | 10.1557/proc-517-463 | Externe URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032302275&doi=10.1557%2fproc-517-463&partnerID=40&md5=207a985228e4a8ade27079878308fe27 |
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geprüft am 08.06.2024