Faraday Polarisation Mode Conversion in Semiconductor Waveguides Incorporating Periodic Garnet Claddings

摘要

We report on our progress towards the integration of nonreciprocal optical elements in, for example, an integrated\udoptical waveguide isolator on conventional semiconductor photonic platforms. Our approach uses an evanescent\udinteraction with a magneto-optic iron garnet upper cladding. Specifically, cerium- and bismuth- substituted\udyttrium and terbium iron garnets were investigated. Device fabrication incorporates RF sputtering, mask lift-off\udto form a grating for a quasi-phase-matched interaction and thermal anneal. A non-reciprocal polarisation-mode\udconversion was observed.