TY - JOUR
T1 - Circular dichroism induced by Fano resonances in planar chiral oligomers
AU - Hopkins, Ben
AU - Poddubny, Alexander N.
AU - Miroshnichenko, Andrey E.
AU - Kivshar, Yuri S.
N1 - Publisher Copyright:
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - We present a general theory of circular dichroism in planar chiral nanostructures with rotational symmetry. It is demonstrated, analytically, that the handedness of the incident field's polarization can control whether a nanostructure induces either absorption or scattering losses, even when the total optical loss (extinction) is polarization-independent. We show that this effect is a consequence of modal interference so that strong circular dichroism in absorption and scattering can be engineered by combining Fano resonances with planar chiral nanoparticle clusters. The energy imparted by circularly polarized light on chiral matter is known to depend on the handedness of light; an effect known as a circular dichroism. This study reveals that an analogous effect can be realized in two-dimensional, planar chiral, nanostructures through a form of circular dichroism in far-field radiation and near-field material absorption that originates from Fano-like modal interference.
AB - We present a general theory of circular dichroism in planar chiral nanostructures with rotational symmetry. It is demonstrated, analytically, that the handedness of the incident field's polarization can control whether a nanostructure induces either absorption or scattering losses, even when the total optical loss (extinction) is polarization-independent. We show that this effect is a consequence of modal interference so that strong circular dichroism in absorption and scattering can be engineered by combining Fano resonances with planar chiral nanoparticle clusters. The energy imparted by circularly polarized light on chiral matter is known to depend on the handedness of light; an effect known as a circular dichroism. This study reveals that an analogous effect can be realized in two-dimensional, planar chiral, nanostructures through a form of circular dichroism in far-field radiation and near-field material absorption that originates from Fano-like modal interference.
KW - Circular dichroism
KW - Fano resonance
KW - Nanoparticle oligomer
KW - Planar chirality
UR - http://www.scopus.com/inward/record.url?scp=84954404584&partnerID=8YFLogxK
U2 - 10.1002/lpor.201500222
DO - 10.1002/lpor.201500222
M3 - Article
SN - 1863-8880
VL - 10
SP - 137
EP - 146
JO - Laser and Photonics Reviews
JF - Laser and Photonics Reviews
IS - 1
ER -