The notion of Electromagnetic Chirality, recently introduced in the Physics literature,

is investigated in the framework of scattering of time-harmonic electromagnetic waves by

bounded scatterers. This type of chirality is defined as a property of the far field operator.

The relation of this novel notion of chirality to that of geometric chirality of the scatterer

is explored. It is shown for several examples of scattering problems that electromagnetic

achirality is a more general property than geometric chirality. On the other hand, a

chiral material law, as for example given by the Drude-Born-Fedorov model, yields an

electromagnetically chiral scatterer. Electromagnetic chirality also allows the definition

of a measure. Scatteres invisible to fields of one helicity turn out to be maximally chiral

with respect to this measure. For a certain class of electromagnetically chiral scatters, we

provide numerical calculations of the measure of chirality through solutions of scattering

problems computed by a boundary element method.

is investigated in the framework of scattering of time-harmonic electromagnetic waves by

bounded scatterers. This type of chirality is defined as a property of the far field operator.

The relation of this novel notion of chirality to that of geometric chirality of the scatterer

is explored. It is shown for several examples of scattering problems that electromagnetic

achirality is a more general property than geometric chirality. On the other hand, a

chiral material law, as for example given by the Drude-Born-Fedorov model, yields an

electromagnetically chiral scatterer. Electromagnetic chirality also allows the definition

of a measure. Scatteres invisible to fields of one helicity turn out to be maximally chiral

with respect to this measure. For a certain class of electromagnetically chiral scatters, we

provide numerical calculations of the measure of chirality through solutions of scattering

problems computed by a boundary element method.

Zugehörige Institution(en) am KIT |
Institut für Angewandte und Numerische Mathematik (IANM) Sonderforschungsbereich 1173 (SFB 1173) |

Publikationstyp |
Forschungsbericht |

Jahr |
2017 |

Sprache |
Englisch |

Identifikator |
DOI(KIT): 10.5445/IR/1000070950 ISSN: 2365-662X URN: urn:nbn:de:swb:90-709504 KITopen ID: 1000070950 |

Verlag |
KIT, Karlsruhe |

Umfang |
18 S. |

Serie |
CRC 1173 ; 2017/14 |

Schlagworte |
electromagnetic scattering, chirality, measure of chirality |

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