Dielectric inspired scaling of polarization conversion subwavelength resonances in open ultrathin chiral structures
Date
2015Source Title
Applied Physics Letters
Print ISSN
0003-6951
Publisher
A I P Publishing LLC
Volume
107
Issue
22
Pages
1 - 6
Language
English
Type
ArticleItem Usage Stats
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Abstract
It is shown that the scaling of subwavelength resonances in open ultrathin chiral structures can be obtained by varying only the permittivity of dielectric spacers, while multiband one-way polarization conversion and related asymmetric transmission remain possible. These features are quite general and obtainable in a wide range of parameter variation. Surprisingly, the difference in the power of ε for the classical ε-1/2 scaling rule and the empirical rules obtained in the present letter does not exceed 22%, giving an important entry point for future theoretical studies and design strategies. Both spectral scaling and conservation of the polarization characteristics can be achieved by using either tunneling or real-index impedance matching. The scaled structures with strong polarization and directional selectivity may have thickness of λ/100 and smaller. © 2015 AIP Publishing LLC.
Keywords
Physical propertiesAsymmetric transmissions
Chiral structures
Design strategies
Dielectric spacers
Directional selectivity
Polarization characteristics
Polarization conversion
Theoretical study
Polarization