Modal expansion of optical far-field quantities using quasinormal modes
1 Zuse Institute Berlin, Takustraße 7, 14195 Berlin, Germany
2 JCMwave GmbH, Bolivarallee 22, 14050 Berlin, Germany
Published online: 20 August 2020
We discuss an approach for modal expansion of optical far-field quantities based on quasinormal modes (QNMs). The issue of the exponential divergence of QNMs is circumvented by contour integration of the far-field quantities involving resonance poles with negative and positive imaginary parts. A numerical realization of the approach is demonstrated by convergence studies for a nanophotonic system.
© The Authors, published by EDP Sciences, 2020
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