Abstract
The magnetoplasmonic structure, which is a planar multimode magnetooptical waveguide, 10 μm thick with plasmon resonance SiO2 / Cu coating on the surface is experimentally realized. With the total length of the magnetooptical waveguide 4.6 mm and the length of the SiO2 / Cu coating equal to 3.9 mm, the insertion loss of the structure for TM- and TE-polarized light was 22 and 4 dB, respectively, at a wavelength of 1550 nm. Linearly polarized light was launched into the magneto-optical waveguide using a SMF-28 single-mode optical fiber coupled to the polished input edge of the waveguide. The structure is of interest for use as miniature magnetically controlled modulators of light intensity.
Highlights
Planar waveguide structures based on dielectric magnetic films are of considerable interest due to the unique property of magneto-optical nonreciprocity and the ability to control the characteristics of the light propagating through them using an external magnetic field
Similar structures in which the actions of the Faraday effect in a dielectric magnetic waveguide and of surface plasmon resonance (SPR) in a metal layer on waveguide surface are combined are not sufficiently studied. This is especially true for structures based on sufficiently thick (8-10 μm) dielectric magnetic waveguides, which can be relatively coupled to a telecomunication singlemode optical fiber
In [6] the possibility of amplifying the nonreciprocity effect in a structure based on a silicon waveguide with a lattice plasmon structure on a surface covered with a dielectric magnetic material Bi: GIG is shown
Summary
Planar waveguide structures based on dielectric magnetic films are of considerable interest due to the unique property of magneto-optical nonreciprocity and the ability to control the characteristics of the light propagating through them using an external magnetic field The study of such structures is widely represented in the literature, where their properties are studied in detail and the possibility of using them as various planar optical devices, such as isolators [1], circulators [2], modulators [3], has been shown. Similar structures in which the actions of the Faraday effect in a dielectric magnetic waveguide and of surface plasmon resonance (SPR) in a metal layer on waveguide surface are combined are not sufficiently studied. In [6] the possibility of amplifying the nonreciprocity effect in a structure based on a silicon waveguide with a lattice plasmon structure on a surface covered with a dielectric magnetic material Bi: GIG is shown
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