Optical metamaterials are man-made materials and have unusual optical properties due to their special nanostructures. In the past 20 years, researchers have designed a variety of metamaterial-based devices, but their properties cannot be changed. Based on this, researchers first A gallium arsenide thin film composed of semiconducting nanoparticle arrays was prepared. After that, gallium arsenide-based metamaterials were prepared by electron beam lithography and plasma etching. When the light source passed, metamaterials could be used on the nanometer scale. The semiconductor particles capture the light source and make it act efficiently, thereby achieving fast 'on' and 'off' speeds of over 100 billion times per second.
New optical metamaterials paved the way for ultra-fast information transmission, while related technologies can be used to construct optical logic devices and provide possibilities for the development of ultra-fast optical computers.