55 citations · 128 across the 9 of their papers we have counts for
10 papers
Maximum non reciprocity in metasurfaces of gyrotropic rods
Ioannis Katsantonis, Constantinos Valagiannopoulos, Anna C. Tasolamprou
Efficiently breaking time-reversal symmetry at the subwavelength scale remains a cornerstone challenge for advanced electromagnetic wave manipulation. This work presents a rigorous…
Enhanced THz third-harmonic generation in graphene via hot-carriers in a topological cavity
Spyros Doukas, Ioannis Katsantonis, Thomas Koschny +2
Graphene is a promising material for nonlinear THz applications owing to its high third-order susceptibility and tunable optical properties. Its strong nonlinear response, driven b…
Cactus-like Metamaterial Structures for Electromagnetically Induced Transparency at THz frequencies
Savvas Papamakarios, Odysseas Tsilipakos, Ioannis Katsantonis +7
THz metamaterials present unique opportunities for next generation technologies and applications, as they can fill the ``THz gap'' originating from the weak response of natural mat…
Ultracompact, dynamically controllable circularly polarized laser enabled by chiral metasurfaces
Ioannis Katsantonis, Anna Tasolamprou, Eleftherios Economou +2
We demonstrate a simple, low-cost and ultracompact chiral resonant metasurface design, which, by strong local coupling to a quantum gain medium (quantum emitters), allows to implem…
Strong and Broadband Pure Optical Activity in 3D Printed THz Chiral Metamaterials
Ioannis Katsantonis, Maria Manousidaki, Anastasios D. Koulouklidis +9
Optical activity (polarization rotation of light) is one of the most desired features of chiral media, as it is important for many polarization related applications. However, in th…
Chirality sensing employing PT-symmetric and other resonant gain-loss optical systems
Ioannis Katsantonis, Sotiris Droulias, Costas M. Soukoulis +3
Molecular chirality detection and enantiomer discrimination are very important issues for many areas of science and technology, prompting intensive investigations via optical metho…
Scattering properties of PT-symmetric chiral metamaterials
Ioannis Katsantonis, Sotiris Droulias, Costas M. Soukoulis +2
The combination of gain and loss in optical systems that respect parity-time (PT)-symmetry has pointed recently to a variety of novel optical phenomena and possibilities. Many of t…
PT-symmetric chiral metamaterials: Asymmetric effects and PT-phase control
Ioannis Katsantonis, Sotiris Droulias, Costas M. Soukoulis +2
We investigate the influence of chirality on the PT-symmetric and PT-broken phase of PT-symmetric chiral systems. Starting from the point that transverse magnetic (TM) and transver…
Accessible phases via wave impedance engineering with PT-symmetric metamaterials
Sotiris Droulias, Ioannis Katsantonis, Maria Kafesaki +2
Optical systems that respect Parity-Time (PT) symmetry can be realized with proper incorporation of gain/loss materials. However, due to the absence of magnetic response at optical…
Chiral metamaterials with PT symmetry and beyond
Sotiris Droulias, Ioannis Katsantonis, Maria Kafesaki +2
Optical systems with gain and loss that respect Parity-Time (PT) symmetry can have real eigenvalues despite their non-Hermitian character. Chiral systems impose circularly polarize…