In a breakthrough study, researchers have developed a new material that can be used in optical cavities to control the properties of light in a vacuum. This material, made up of a combination of magnetic and dielectric materials, is capable of manipulating the properties of light in a vacuum and can be used to create a variety of optical cavities. This material could be used to create a unique type of optical cavity that could be used in a wide range of applications, such as controlling the propagation of light and enabling efficient light manipulation. This new material could revolutionize the way we think about and use optical cavities.

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source: Phys.org