Optical Isolator with Si Guiding Layer Fabricated by UV-Activated Bonding

An interferometric optical isolator, with a Si guiding layer, employing a nonreciprocal phase shift has been studied. The optical isolator is comprised of a magneto-optic waveguide with a magnetic garnet / Si / SiO2 structure, which is fabricated by wafer bonding technique. The nonreciprocal phase shift was calculated for magneto-optic waveguides with various layer structures. Wafer bonding between a garnet crystal and Si was also investigated