Abstract
Magnetooptical waveguides combine the functionalities of the waveguide devices with the possibility to manipulate light using an external magnetic field. This chapter is devoted to the physics and applications of such magnetooptical waveguides. First, the magnetic field impact on the mode properties of planar waveguides with a magnetic core is described analytically. Changes of the mode properties of such waveguides, such as polarization modification, nonreciprocal dispersion shift, are revealed for three basic configurations of the magnetic field. This simple system reveals effects that would be seen in more complex waveguiding systems and heterostructures, such as ridge waveguides, waveguide gratings. Next, experimental observation of various polarization and intensity effects related to the magnetooptical properties of planar and ridge extended waveguides, as well as guided-mode-based gratings, is discussed. The last part of the chapter provides application state-of-the-art describing magnetooptical planar, ridge waveguides, guided-mode gratings, and various hybrid structures for light modulators, nonreciprocal elements, magnetic field sensors, and other devices.
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