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

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

2011-09-14

arxiv.org/abs/1109.3048v2

Physical Review B, vol. 85, p. 073102 (2012)

Physics

Optics

5 pages, 6 figures

Scientific paper

10.1103/PhysRevB.85.073102

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.

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