48 results about "Magnetic photonic crystal" patented technology

A method of amplifying a magneto-optical Kerr effect by using photon crystal structures, and a photon crystal having an amplified magneto-optical Kerr effect, and a method of fabricating the photon crystal. The method of amplifying a magneto-optical Kerr effect by using photon crystal structures includes amplifying the magneto-optical Kerr effect by fabricating a magnetic photon crystal including a crystal magnet and using a periodically-structured surface of the crystal magnet.

Belonging to the field of material science, the invention relates to a biological template preparation based preparation method for magnetic photonic crystals. The method comprises the following steps of: step one, conducting surface pretreatment on a biological template; step two, preparing a precursor metal sol-gel solution; step three, putting the well treated biological template into the prepared precursor solution for dipping treatment; step four, after dipping, taking out of a sample, flushing it with distilled water, and conducting drying and roasting to remove the biological template, thus obtaining a ferric oxide material maintaining a photonic crystal structure; and step five, carrying out further sintering and reducing in a mixed gas of hydrogen and argon, thus obtaining a magnetic ferroferric oxide material maintaining a photonic crystal structure. Compared with prior art, the magnetic material with a natural photonic crystal structure prepared in the invention has good response to magnetism-light, thus having potential application prospects in the field of magneto-optical communication devices.

The invention relates to a one-way slow light defect waveguiding structure based on magnetic photonic crystals and a non-reciprocal device. In the one-way slow light defect waveguiding structure, multiple second dielectric cylinders are distributed at the two sides of first dielectric cylinders which are arranged in lines and periodically arranged into the tone-way slow light defect waveguiding structure and the non-reciprocal device, by inserting the first dielectric cylinders which are arranged in lines into the magnetic photonic crystals to form a defect structure, when a magnetic field is applied to the two-dimensional magnetic photonic crystal areas formed by the second dielectric cylinders which are distributed at the two sides of the first dielectric cylinders, if an opposite external bias magnetic field is applied in the +Z direction, two one-way boundary modes in the same direction can be formed to form positive coupling, and one-way transmission and slow light characteristics of electromagnetic waves can be achieved. In addition, the one-way slow light defect waveguiding structure solves the problems that traditional non-reciprocal devices such as an optical isolator are large is size, huge in damage and difficult to integrate and has the wide market application value in the non-reciprocal devices such as an optical communication device.

The invention discloses a one-dimensional magneto-photonic crystal chain with an asymmetric primitive structure. A T-shaped primitive is adopted, the one-dimensional magneto-photonic crystal chain is formed through lattice constant a periodic array. The primitive can also adopt space asymmetry structures such as a triangle and a semicircle. The primitive adopts a ferrite material, and a background material is an isotropic medium such as air. Accordingly, space inversion, time reversal and mirror symmetry are broken simultaneously, the one-dimensional magneto-photonic crystal chain with the asymmetric primitive structure is constructed, and one-way bulk wave mode transmission is achieved. By means of an energy band structure, energy transfer simulation and experiments, it is verified that the structure has good one-way transmission. The one-dimensional magneto-photonic crystal chain has the advantages of being arranged in a regulable and flexible mode and the like.