Giant gyrotropy due to electromagnetic-field coupling in a bilayered chiral structure

We report experimental evidence that electromagnetic coupling between physically separated planar metal patterns located in parallel planes provides for extremely strong polarization rotatory power if one pattern is twisted with respect to the other, creating a chiral object. In terms of a rotary po...

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Bibliographic Details
Published in:Physical review letters 2006-10, Vol.97 (17), p.177401-177401, Article 177401
Main Authors: Rogacheva, A V, Fedotov, V A, Schwanecke, A S, Zheludev, N I
Format: Article
Language:English
Subjects:
Circular Dichroism
Electromagnetic Fields
Molecular Conformation
Stereoisomerism
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Summary:We report experimental evidence that electromagnetic coupling between physically separated planar metal patterns located in parallel planes provides for extremely strong polarization rotatory power if one pattern is twisted with respect to the other, creating a chiral object. In terms of a rotary power per sample thickness equal to one wavelength, the bilayered structure rotates 5 orders of magnitude stronger than a gyrotropic crystal of quartz in the visible spectrum.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.97.177401