223 citations · 904 across the 26 of their papers we have counts for
28 papers
Graphene-Gold THz Metasurfaces with Tailored Resonant Structure for Enhanced Nonlinear Response
Anna Theodosi, Isaac Appiah Otoo, Anastasios D. Koulouklidis +10
Graphene's exceptional nonlinear optical properties combined with resonant photonic structures offer a promising pathway for efficient nonlinear applications at terahertz (THz) fre…
Can 2D materials enable passively -switched lasers in the nanoscale?
Thomas Christopoulos, Johanne Hizanidis, Georgios Nousios +2
Achieving compact on-chip pulsed lasers with attractive performance metrics and compatibility with the silicon photonics platform is an important, yet elusive, goal in contemporary…
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…
Temporal coupled-mode theory in nonlinear resonant photonics: From basic principles to contemporary systems with 2D materials, dispersion, loss, and gain
Thomas Christopoulos, Odysseas Tsilipakos, Emmanouil E. Kriezis
Temporal coupled-mode theory (CMT) is an acclaimed and widely used theoretical framework for modeling the continuous wave (CW) response and temporal dynamics of any integrated or f…
Multiresonant metasurfaces for arbitrarily-broadband pulse chirping and dispersion compensation
Odysseas Tsilipakos, Thomas Koschny
We show that ultrathin metasurfaces with a specific multiresonant response can enable simultaneously arbitrarily-strong and arbitrarily-broadband dispersion compensation, pulse (de…
Impact of plasmonic modes on the formation of self-organised nano-patterns in thin films
Panagiotis Lingos, George Perrakis, Odysseas Tsilipakos +2
Formation of nanoscale laser-induced periodic surface structures on thin metal films (of the size of the optical penetration depth) is a yet unexplored area that is expected to ope…
Multimode non-Hermitian framework for third harmonic generation in nonlinear photonic systems comprising 2D materials
Thomas Christopoulos, Emmanouil E. Kriezis, Odysseas Tsilipakos
Resonant structures in modern nanophotonics are non-Hermitian (leaky and lossy), and support quasinormal modes. Moreover, contemporary cavities frequently include 2D materials to e…
XR-RF Imaging Enabled by Software-Defined Metasurfaces and Machine Learning: Foundational Vision, Technologies and Challenges
C. Liaskos, A. Tsioliaridou, K. Georgopoulos +18
We present a new approach to Extended Reality (XR), denoted as iCOPYWAVES, which seeks to offer naturally low-latency operation and cost-effectiveness, overcoming the critical scal…
Multi-functional metasurface architecture for amplitude, polarization and wavefront control
A. Pitilakis, M. Seckel, A. C. Tasolamprou +10
Metasurfaces (MSs) have been utilized to manipulate different properties of electromagnetic waves. By combining local control over the wave amplitude, phase, and polarization into…
Multi-Wideband Terahertz Communications via Tunable Graphene-based Metasurfaces in 6G Networks
Hamidreza Taghvaee, Alexandros Pitilakis, Odysseas Tsilipakos +6
The next generation of wireless networks is expected to tap into the terahertz (0.1--10 THz) band to satisfy the extreme latency and bandwidth density requirements of future applic…
Experimental demonstration of ultrathin broken-symmetry metasurfaces with controllably sharp resonant response
Odysseas Tsilipakos, Luca Maiolo, Francesco Maita +5
Symmetry-protected resonances can be made to couple with free space by introducing a small degree of geometric asymmetry, leading to controllably-sharp spectral response. Here, we…
Topological Extraordinary Optical Transmission
K. Baskourelos, O. Tsilipakos, T. Stefański +4
The incumbent technology for bringing light to the nanoscale, the near-field scanning optical microscope, has notoriously small throughput efficiencies - of the order of 10^(-4) -…
Scalability Analysis of Programmable Metasurfaces for Beam Steering
Hamidreza Taghvaee, Sergi Abadal, Alexandros Pitilakis +7
Programmable metasurfaces have garnered significant attention as they confer unprecedented control over the electromagnetic response of any surface. Such feature has given rise to…
A multi-functional reconfigurable metasurface: Electromagnetic design accounting for fabrication aspects
Alexandros Pitilakis, Odysseas Tsilipakos, Fu Liu +12
In this paper we present the theoretical considerations and the design evolution of a proof-of-concept reconfigurable metasurface, primarily used as a tunable microwave absorber, b…
The Software-Defined Metasurfaces Concept and Electromagnetic Aspects
Anna C. Tasolamprou, Alexandros Pitilakis, Odysseas Tsilipakos +17
We present the concept and electromagnetic aspects of HyperSurFaces (HSFs), artificial, ultrathin structures with software controlled electromagnetic properties. The HSFs key unit…
ABSense: Sensing Electromagnetic Waves on Metasurfaces via Ambient Compilation of Full Absorption
C. Liaskos, G. Pirialakos, A. Pitilakis +13
Metasurfaces constitute effective media for manipulating and transforming impinging EM waves. Related studies have explored a series of impactful MS capabilities and applications i…
Toroidal eigenmodes in all-dielectric metamolecules
Anna C. Tasolamprou, Odysseas Tsilipakos, Maria Kafesaki +2
We present a thorough investigation of the electromagnetic resonant modes supported by systems of polaritonic rods placed at the vertices of canonical polygons. The study is conduc…
Exploration of Intercell Wireless Millimeter-Wave Communication in the Landscape of Intelligent Metasurfaces
Anna C. Tasolamprou, Alexandros Pitilakis, Sergi Abadal +19
Software-defined metasurfaces are electromagnetically ultra-thin, artificial components that can provide engineered and externally controllable functionalities. The control over th…
Dynamic Anapole in Metasurfaces made of Sculptured Cylinders
Evangelia Takou, Anna C. Tasolamprou, Odysseas Tsilipakos +1
We present all-dielectric polaritonic metasurfaces consisting of properly sculptured cylinders to sustain the dynamic anapole, i.e. a non-radiating alternating current distribution…
Joint Compressed Sensing and Manipulation of Wireless Emissions with Intelligent Surfaces
Christos Liaskos, Ageliki Tsioliaridou, Alexandros Pitilakis +8
Programmable, intelligent surfaces can manipulate electromagnetic waves impinging upon them, producing arbitrarily shaped reflection, refraction and diffraction, to the benefit of…
Electromagnetic Aspects of Practical Approaches to Realization of Intelligent Metasurfaces
Fu Liu, Odysseas Tsilipakos, Xuchen Wang +9
We thoroughly investigate the electromagnetic response of intelligent functional metasurfaces. We study two distinct designs operating at different frequency regimes, namely, a swi…
Tunable Perfect Anomalous Reflection in Metasurfaces with Capacitive Lumped Elements
Odysseas Tsilipakos, Fu Liu, Alexandros Pitilakis +8
We demonstrate tunable perfect anomalous reflection with metasurfaces incorporating lumped elements. The tunable capacitance of each element provides continuous control over the lo…
Metasurfaces with Interleaved Electric and Magnetic Resonances for Broadband Arbitrary Group Delay in Reflection
Odysseas Tsilipakos, Thomas Koschny, Costas M. Soukoulis
Metasurfaces impart phase discontinuities on impinging electromagnetic waves that are typically limited to 0-2. Here, we show that they can break free from this limitation and s…
Software-Defined Metasurface Paradigm: Concept, Challenges, Prospects
Alexandros Pitilakis, Anna C. Tasolamprou, Christos Liaskos +13
HyperSurfaces (HSFs) are devices whose electromagnetic (EM) behavior is software-driven, i.e., it can be defined programmatically. The key components of this emerging technology ar…