Metamaterials: Controlling Energy Radiations of Electromagnetic Waves via Frequency Coding Metamaterials (Adv. Sci. 9/2017)

In article 1700098, frequency coding metamaterial is introduced to achieve different controls of electromagnetic waves with a fixed spatial coding pattern when the frequency changes, by Tie Jun Cui and co-workers. The digital units of frequency coding metamaterials are having different shapes to obtain suitable initial phase responses and different phase sensitivities, which provides another degree of freedom to control electromagnetic energy radiations in the frequency domain.