This invention is useful for microwave, integrated optical and photonic circuits, and other optical applications.
Photonic crystals are structures with periodicity comparable to the wavelength of light. They possess many technologically important optical properties and can suppress back scattering in optical waveguides.
The invention is a waveguide that includes a photonic crystal structure that restricts light to travel in only one direction. This photonic structure comprises of gyromagnetic materials arranged in a two-dimensional lattice formation that exhibits a plurality of one-way edge modes produced as a result of magneto-optic effects. A confining barrier is positioned around the photonic crystal to allow the one-way edge modes to propagate it. Radiation sources placed in or around the photonic crystal structure couples electromagnetic energy in to and out of the waveguide. Finally, attached magnets produce a static external magnetic field that induces the magneto-optic effects such that the one-way modes are allowed to propagate in one direction in the photonic crystal structure.
- It eliminates backscattering, even in the presence of large disorders
- It can be implemented to operate in a variety of frequency ranges