Journal
ADVANCED OPTICAL MATERIALS
Volume 7, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201900056
Keywords
bismuth iron garnets; magneto-optical garnets; magneto-optics; monolithic integration; optical isolators; sidewall; thin films
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Funding
- National Science Foundation [ECCS 1607865]
- MRSEC Program of the NSF [DMR - 1419807]
- Grant Agency of Charles University [GAUK 250678]
- Project of Czech Ministry of Education [LTAUSA18176]
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Thin film magneto-optical (MO) materials are enablers for integrated nonreciprocal photonic devices such as isolators and circulators. Films of polycrystalline bismuth-substituted yttrium iron garnet (Bi:YIG) have been grown on silicon substrates and waveguide devices, in which an yttrium iron garnet (YIG) seedlayer is placed either above or below the active Bi:YIG layer to promote crystallization. The films exhibit a high MO figure of merit of up to 769 degrees dB(-1) at 1550 nm wavelength. Growth of single phase Bi:YIG on the sidewalls of waveguides is demonstrated, which can be used in nonreciprocal transverse electric (TE)-mode devices.
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