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 Variable group delay in a metamaterial with field-gradient-induced transparency


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We realize variable control of the group delay in an electromagnetically induced transparency-like metamaterial. Its unit cell is designed to have a bright mode and a dark 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 delay 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.



Author: Yasuhiro Tamayama; Toshihiro Nakanishi; Masao Kitano

Source: https://archive.org/







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