861 citations · 1.2k across the 9 of their papers we have counts for
10 papers
Nanostructures for very broadband or multi-frequency transition from wave beams to a subwavelength light distributions
O. Luukkonen, J. Pniewski, C. Simovski
In this paper we suggest and theoretically study a tapered plasmonic nanostructure which connects the incident wave beam with a subwavelength spatial region where the field is loca…
Effects of Spatial Dispersion on Reflection from Mushroom-type Artificial Impedance Surfaces
Olli Luukkonen, Mário G. Silveirinha, Alexander B. Yakovlev +3
Several recent works have emphasized the role of spatial dispersion in wire media, and demonstrated that arrays of parallel metallic wires may behave very differently from a uniaxi…
Broadband cloaking with volumetric structures composed of two-dimensional transmission-line networks
Pekka Alitalo, Olli Luukkonen, Juan Mosig +1
The cloaking performance of two microwave cloaks, both based on the recently proposed transmission-line approach, are studied using commercial full-wave simulation software. The cl…
Grounded Uniaxial Material Slabs as Magnetic Conductors
Olli Luukkonen, Constantin R. Simovski, Sergei A. Tretyakov
The objective of this paper is all-angle artificial magnetic conductor, i.e. artificial magnetic conductor that has stable magnetic-wall effect with respect to the incidence angle.…
Impedance-matched microwave lens
Pekka Alitalo, Olli Luukkonen, Joni Vehmas +1
A microwave lens with highly reduced reflectance, as compared to conventional dielectric lenses, is proposed. The lens is based on two-dimensional or three-dimensional transmission…
An Efficient and Simple Analytical Model for Analysis of Propagation Properties in Impedance Waveguides
Olli Luukkonen, Constantin R. Simovski, Antti V. Räisänen +1
In this paper propagation properties of a parallel-plate waveguide with tunable artificial impedance surfaces as sidewalls are studied both analytically and numerically. The impeda…