Extended optical waveguide theory with magneto-optical effect and magnetoelectric effect.

Area of Science:

• Photonics and Materials Science
• Theoretical Electromagnetics and Waveguide Theory

Background:

• Optical waveguide theory is fundamental for optical device development.
• Existing theories address magneto-optical (MO) or magnetoelectric (ME) effects separately.
• A comprehensive theory integrating both MO and ME effects in waveguides is lacking.

Purpose of the Study:

• To extend conventional optical waveguide theory by incorporating constitutive relations for both MO and ME effects.
• To analyze propagation properties in a medium with independently controllable MO and ME effects.
• To investigate the interplay between MO and ME effects for advanced optical functionalities.

Main Methods:

• Developed an extended waveguide theory incorporating coupled MO and ME constitutive relations.
• Analyzed wave propagation in a structured medium combining metamaterials and magnetic materials.
• Investigated the influence of material arrangement and magnetization direction on propagation characteristics.

Main Results:

• Confirmed interaction between MO and ME effects is dependent on metamaterial arrangement and magnetization direction.
• Demonstrated that this interaction can lead to nonreciprocal polarization control.
• Observed enhanced nonreciprocal behavior in waveguide propagation compared to plane wave propagation.

Conclusions:

• The extended theory provides a framework for designing optical waveguides with tunable MO and ME properties.
• Independent control over MO and ME effects enables novel nonreciprocal optical phenomena.
• This research paves the way for advanced optical devices with polarization-selective functionalities.