Complete magneto-optical waveguide mode conversion in Cd_(1-x)Mn_xTe waveguide on GaAs substrate

摘要

Complete magneto-optical mode conversion was attained in a waveguide of diluted magnetic semiconductor Cd_(1-x)Mn_xTe grown on GaAs substrate. Mode conversion ratio 98%±2% under a magnetic field of 5 kG was achieved in the waveguide with graded-refractive-index clad layer. The Cd_(1-x)Mn_xTe waveguide showed an optical loss below 1 dB/cm, and a high magneto-optical figure-of-merit. 200 deg/dB/kG at λ = 730 nm. High efficiency magneto-optical mode conversion in a waveguide grown on a semiconductor substrate shows the feasibility of monolithical integration of an optical isolator with semiconductor optoelectronic devices.