Present a variety of unusual electromagnetic and optical properties, such as reversed Doppler shift, Cherenkov radiation, Goos-Hanchen shift, negative refraction effect and perfect lens.

• 满足左手定则而得名。 左手材料中传播的相速度和群速度方向相反,因而表现出一系列奇异的电磁学特性,如反常Doppler效应、反常Cherenkov辐射、反常Goos-H(?)