Title :
Thermal annealing of magneto-optical (Cd,Mn)Te waveguide for wider operation wavelength range of optical isolator
Author :
Debnath, M.C. ; Zayets, V. ; Ando, K.
Author_Institution :
Nanoelectron. Res. Inst., Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki, Japan
Abstract :
Several Cd1-xMnxTe (x = 0.225) core waveguides with graded-refractive-index (x = 0.225 - 0.26) layers are grown at 300°C by molecular beam epitaxy (MBE) and annealed in the MBE chamber at different temperatures between 400°C and 450°C for 5 min. The post-growth annealing results in a wider wavelength range (between 710 nm and 735 nm) of the complete mode conversion ratio of the waveguides. The low optical propagation loss, high magneto-optical figure of merit and an isolation effect of annealed waveguides are also examined. The results of this experiment demonstrate the feasibility of (Cd,Mn)Te waveguide for the practical waveguide optical isolator.
Keywords :
Faraday effect; annealing; cadmium alloys; magneto-optical isolators; manganese alloys; molecular beam epitaxial growth; optical losses; optical waveguides; refractive index; tellurium alloys; 400 to 450 degC; 5 min; 710 to 735 nm; Cd1-xMnxTe; complete mode conversion ratio; core waveguides; graded-refractive-index layers; isolation effect; magneto-optical effect; magneto-optical waveguide; molecular beam epitaxy; operation wavelength; optical propagation loss; post-growth annealing; thermal annealing; waveguide optical isolator; Annealing; Isolators; Magnetic cores; Magnetooptic effects; Molecular beam epitaxial growth; Optical propagation; Optical waveguides; Tellurium; Temperature; Wavelength conversion;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464266
