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Measuring the electromagnetic chirality of 2D arrays under normal illumination

Garcia-Santiago, Xavier; Burger, S; Rockstuhl, Carsten; Fernandez-Corbaton, Ivan

Abstract (englisch):
We present an electromagnetic chirality measure for 2D arrays of subwavelength periodicities under normal illumination. The calculation of the measure uses only the complex reflection and transmission coefficients from the array. The measure allows the ordering of arrays according to their electromagnetic chirality, which further allows a quantitative comparison of different design strategies. The measure is upper bounded, and the extreme properties of objects with high values of electromagnetic chirality make them useful in both near- and far-field applications. We analyze the consequences that different possible symmetries of the array have on its electromagnetic chirality. We use the measure to study four different arrays. The results indicate the suitability of helices for building arrays of high electromagnetic chirality, and the low effectiveness of a substrate for breaking the transverse mirror symmetry.


Zugehörige Institution(en) am KIT Institut für Angewandte Physik (APH)
Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0146-9592, 1539-4794
KITopen ID: 1000076126
HGF-Programm 43.23.01; LK 01
Erschienen in Optics letters
Band 42
Heft 20
Seiten 4075-4078
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