Abstract: Metamaterials as a new kind of artificial materials, have attracted wide attention, because they can present special properties not exist naturally or hard be realized. Based on the quantized method of the LC circuit model, our group has studied the elementary excitation in metamaterial and introduced its “quasi-particle”. By using the two-photon inference, the quantum property of metamaterial and the correctness of the quantized method have been proved. This quantized method has been further used to investigate the interaction between metamaterial and active material, and the amplification by the stimulated emission radiation can be found in this system. These results show that metamaterials not only can steer the light in classical regime but also have a potential application in quantum optics.

Key words: quantum optics, metamaterial, two-photon interference, elementary excitation, light-matter interaction