Phys.org  April 26, 2023 Time metamaterials offer a great potential for wave manipulation. Researchers at the City University of New York explored the exotic wave dynamics of an anisotropic photonic time crystal (APTC) formed by an anisotropic medium whose optical properties are uniformly and periodically changed in time. Based on a temporal transfer matrix formalism, they showed that a stationary charge embedded in an APTC emits radiation, in contrast to the case of isotropic photonic time crystals, and its distribution in momentum space is controlled by the APTC band structure. According to the researchers their approach greatly extends the concept […]