META 2021, META'12

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Variable control of group velocity in a metamaterial with field-gradient-induced transparency
Yasuhiro Tamayama, Toshihiro Nakanishi, Masao Kitano

Last modified: 2012-01-02


We realize variable control of the group velocity in an electromagnetically induced transparency-like metamaterial. Its unit cell is designed to have a radiative mode and a trapped mode. The coupling strength between these two modes is determined by the electromagnetic field gradient. In this metamaterial with field-gradient-induced transparency, the group velocity at the transparency frequency can be varied by varying the incident angle of the electromagnetic plane waves. By tilting a single layer of the metamaterial, the group delay of a microwave pulse can be varied between 0.50 and 1.85 ns.


metamaterials; electromagnetically induced transparency; group velocity