Embodiments of synthetic garnet materials having advantageous properties, especially for below resonance frequency applications, are disclosed herein. In particular, embodiments of the synthetic garnet materials can have high Curie temperatures and dielectric constants while maintaining low magnetization. These materials can be incorporated into isolators and circulators, such as for use in telecommunication base stations.

The present invention relates to a ferrofluid display control device including: a storage part whose at least a front surface is made of a transparent material to store a transparent liquid and a ferrofluid therein and to display the movements of the transparent liquid and the ferrofluid; an input part disposed on one side of the storage part to detect the selection of a frequency range control input signal capable of controlling the movements of the ferrofluid; a controller for generating a magnetic field supply control signal for controlling the intensity of the magnetic field supplied to the ferrofluid; and a magnetic field supply part having an electromagnet disposed on one side of the rear surface of the storage part.

A nanocomposite particle and a magnetron display device are disclosed. The nanocomposite particle includes a magnetic core, and a first protection layer and a luminescent that sequentially cover the magnetic core. A length of the nanocomposite particle in a long axis direction is different from a length of the nanocomposite particle in a short axis direction.

Disclosed is a frequency-dependent microwave filter (1). The filter (1) comprises an enclosure (11) comprising a filter medium including at least one constituent of: atoms, molecules, ions, and point defects in an optically pumpable solid. The at least one constituent is excitable to an initial energy state. The filter (1) further comprises a field generator (12) configured to generate an inhomogeneous electric and/or magnetic field (12A) within the enclosure (11). The filter (1) further comprises means (13) for feedthrough of a microwave signal through the enclosure (11) and an optical pump (14) configured to periodically excite the at least one constituent of the filter medium to the initial energy state in alternation with the feedthrough of the microwave signal through the enclosure (11). Thereby, intensity-dependent filtering is achieved.

The present disclosure provides an optical circulator. The optical circulator includes a first integrated module, a second integrated module and a third integrated module which are sequentially connected from front to rear. The first integrated module includes a mating shell, an optical fiber ferrule received in the mating shell and a first birefringence crystal attached to a rear surface of the optical fiber ferrule; the second integrated module comprises a first tube fixed behind the mating shell, a magnetic ring received in the first tube, a Wollaston prism fixed in the magnetic ring, two Faraday rotators respectively provided to both sides of the Wollaston prism, and two collimating lenses respectively provided to both sides of the two Faraday rotators. The third integrated module includes a second tube fixed behind the first tube, a dual fiber pigtail received in the second tube, and a second birefringence crystal attached to a front surface of the dual fiber pigtail. The above-mentioned optical circulator is small in volume and convenient to manufacture.

Provided is a magneto-optic element that enables easy size reduction of an optical isolator. A magneto-optic element is formed of two or more magnetic members joined together.

Provided is a magneto-optic element that enables easy size reduction of an optical isolator. A magneto-optic element is formed of two or more magnetic members joined together.

The light detection element includes a light-sensitive layer configured to generate a voltage when light is applied, a first electrode, and a second electrode. The light-sensitive layer is located between the first electrode and the second electrode. The second electrode is a metal containing at least one element selected from the group consisting of ruthenium, molybdenum, and tungsten.

The light detection element includes a light-sensitive layer configured to generate a voltage when light is applied, a first electrode, and a second electrode. The light-sensitive layer is located between the first electrode and the second electrode. The second electrode is a metal containing at least one element selected from the group consisting of ruthenium, molybdenum, and tungsten.

Provided is an optical body capable of arbitrarily and quickly controlling the optical characteristics of incident light. A refractive index variable layer (8) formed of PLZT or other material and a magneto-optical material layer (9) formed of garnet or other material are provided side by side between a first reflective layer (3) and a second reflective layer (5). If linearly polarized light is made incident from the side of the first reflective layer (3), the incident light interacts with the magneto-optical material layer (9) and is converted into a right-circularly polarized light component and a left-circularly polarized light component. A very small retardation occurring between both the right- and left-circularly polarized light components is amplified through multiple reflections between the pair of reflective layers (3, 5) and is controlled according to a controlled refractive index of the refractive index variable layer (8).