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Light Management for Engineering Luminescence in Nanoscale Environments By Numerical Optimization
(2018)
Benchmarking five computational methods for analyzing large photonic crystal membrane cavities
(2017)
The interaction of light and chiral matter is subject of recent research both in fundamental science and applications.
Among these are the helicity of electromagnetic fields described with the optical chirality density and emitters sensitive to
circular polarization employed in quantum communications.
In the weak coupling regime of chiral emitters, we analyze the conversion of chirality which can be regarded as an analogue
to absorption of energy describing the change of circular polarization of the incident field. This enables the tailoring of
chiral near-fields close to metamaterials, e.g. composed of gold helices, and gives insights into extinction measurements
such as circular dichroism.
We show relation of the weak and strong coupling regime. The latter can be modelled with cross electric-magnetic polarizabilities or
with effective chiral materials, i.e. bi-anisotropic media. Accordingly, we motivate the necessity for rigorous numerical
simulations to accurately describe chiral light-matter interaction.
The helicity of light is of great interest
in both fundamental research and in applications such as dichroism spectroscopy. Its
time-harmonic formulation is directly proportional to the density of optical chirality.
Recently, both an helicity optical theorem
(HOT) and a chirality conservation law
(CCL) have been formulated for arbitrary
scatterers taking into account an underlying
continuity equation of this quantity. We
summarize these two equivalent fundamental laws and analyze their potential applications.