RT Journal Article
T1 Spatial dispersion in two-dimensional plasmonic crystals: Large blueshifts promoted by diffraction anomalies
A1 Christin, David
A1 Christensen, Johan
A1 Mortensen, N. Asger
AB We develop a methodology to incorporate nonlocal optical response of the free electron gas due to quantum-interaction effects in metal components of periodic two-dimensional plasmonic crystals and study the impact of spatial dispersion on promising building blocks for photonic circuits. Within the framework of the hydrodynamic model, we observe significant changes with respect to the commonly employed local-response approximation, but also in comparison with homogeneous metal films where nonlocal effects have previously been considered. Notable are the emergence of a contribution from nonlocality at normal incidence and the surprisingly large structural parameters at which finite blueshifts are observable, which we attribute to diffraction that offers nonvanishing in-plane wave vector components and increases the penetration depth of longitudinal (nonlocal) modes.
PB American Physical Society
SN 2469-9950
YR 2016
FD 2016-10-12
LK https://hdl.handle.net/10016/38843
UL https://hdl.handle.net/10016/38843
LA eng
NO We acknowledge Sanshui Xiao for fruitful discussions.  C. D. thanks the Deutsche Forschungsgemeinschaft (German Research Foundation) for financial support through a DFG  research fellowship (No. 268910011) .J.C. acknowledges financial support from the Danish Council for Independent Research and a Sapere Aude Grant (FTP No. 12-134776). N.A.M. acknowledges support from the Danish Council for  Independent Research (FNU No. 1323-00087). The Center for  Nanostructured Graphene is sponsored by the Danish National Research Foundation, Project No. DNRF103.
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