Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 21, Issue 29, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/29/292201
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Funding
- UK EPSRC
- Engineering and Physical Sciences Research Council [EP/D503795/1] Funding Source: researchfish
- Medical Research Council [MC_U120061309] Funding Source: researchfish
- EPSRC [EP/D503795/1] Funding Source: UKRI
- MRC [MC_U120061309] Funding Source: UKRI
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Chiral Swiss rolls, consisting of a metal/dielectric laminate tape helically wound on an insulating mandrel, have been developed to form the basis of a highly chiral metamaterial. We have fabricated these elements using a custom-built machine, and have characterized them. We find that the permeability, permittivity, and chirality are all resonant in the region of 80 MHz. The chirality is so strong that it can be directly measured by observing the magnetic response to an applied electric field, and is larger than either the permeability or the permittivity. We have estimated the refractive indices from these data, and find both strong circular dichroism and a wide frequency range where the refractive index is negative.
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