72 citations · 72 across the 1 of their papers we have counts for
5 papers
Broadband chiral metamaterials with large optical activity
Kirsty Hannam, David A. Powell, Ilya V. Shadrivov +1
We study theoretically and experimentally a novel type of metamaterial with hybrid elements composed of twisted pairs of cross-shaped meta-atoms and their complements. We reveal th…
Dispersionless optical activity in metamaterials
Kirsty Hannam, David A. Powell, Ilya V. Shadrivov +1
We introduce a chiral metamaterial with strong, non-resonant optical activity, and very low polarization ellipticity. We achieve this by combining a meta-atom and its complementary…
Tuning the Nonlinear Response of Coupled Split-Ring Resonators
Kirsty E. Hannam, David A. Powell, Ilya V. Shadrivov +1
We introduce the concept of controlling the nonlinear response of the metamaterial by altering its internal structure. We experimentally demonstrate tuning of the nonlinear respons…
Near-field interaction of twisted split-ring resonators
David A. Powell, Kirsty Hannam, Ilya V. Shadrivov +1
We present experimental, numerical and analytical results for the study of near-field interaction of twisted split-ring resonators, the basic elements of the so-called stereometama…
Rotational tuning of interaction in metamaterials
Kirsty Hannam, David A. Powell, Ilya V. Shadrivov +1
We experimentally observe the tuning of metamaterials through the relative rotation of the elements about their common axis. In contrast to previous results we observe a crossing o…