Toward intelligent metasurfaces: the progress from globally tunable metasurfaces to software‐defined metasurfaces with an embedded network of controllers

O Tsilipakos, AC Tasolamprou… - Advanced optical …, 2020 - Wiley Online Library
Metasurfaces, the ultrathin, 2D version of metamaterials, have recently attracted a surge of
attention for their capability to manipulate electromagnetic waves. Recent advances in …

Germanium nanosheets with dirac characteristics as a saturable absorber for ultrafast pulse generation

H Mu, Y Liu, SR Bongu, X Bao, L Li, S Xiao… - Advanced …, 2021 - Wiley Online Library
Bulk germanium as a group‐IV photonic material has been widely studied due to its
relatively large refractive index and broadband and low propagation loss from near‐infrared …

Data-driven model discovery of ideal four-wave mixing in nonlinear fibre optics

AV Ermolaev, A Sheveleva, G Genty, C Finot… - Scientific Reports, 2022 - nature.com
We show using numerical simulations that data driven discovery using sparse regression
can be used to extract the governing differential equation model of ideal four-wave mixing in …

Integrated Lasers with Transition-Metal-Dichalcogenide Heterostructures: Analysis and Design Utilizing Coupled-Mode Theory for Two-Dimensional Materials

G Nousios, T Christopoulos, O Tsilipakos… - Physical Review Applied, 2023 - APS
We assess the continuous-wave and dynamic performance of a photonic laser cavity
consisting of a silicon-rich-nitride-on-insulator disk resonator overlaid with a transition-metal …

Multimode non-Hermitian framework for third harmonic generation in nonlinear photonic systems comprising two-dimensional materials

T Christopoulos, EE Kriezis, O Tsilipakos - Physical Review B, 2023 - APS
Resonant structures in modern nanophotonics are non-Hermitian (leaky and lossy), and
support quasinormal modes. Moreover, contemporary cavities frequently include two …

Enhanced terahertz third-harmonic generation in graphene–metal metasurface with bound states in the continuum

B Wang, J Liu, J Liu, J Liu, J Liu, W Sun… - Journal of Applied …, 2023 - pubs.aip.org
We propose a graphene–metal metasurface with bound states in the continuum (BICs) for
the enhancement of terahertz (THz) third-harmonic generation (THG). With the adjustment of …

Efficient frequency conversion with geometric phase control in optical metasurfaces

B Reineke Matsudo, B Sain, L Carletti… - Advanced …, 2022 - Wiley Online Library
Metasurfaces have appeared as a versatile platform for miniaturized functional nonlinear
optics due to their design freedom in tailoring wavefronts. The key factor that limits its …

2D-patterned graphene metasurfaces for efficient third harmonic generation at THz frequencies

A Theodosi, O Tsilipakos, CM Soukoulis… - Optics …, 2022 - opg.optica.org
Graphene is an attractive two-dimensional material for nonlinear applications in the THz
regime, since it possesses high third order nonlinearity and the ability to support tightly …

Large enhancement of the effective second-order nonlinearity in graphene metasurfaces

Q Ren, JW You, NC Panoiu - Physical Review B, 2019 - APS
Using a powerful homogenization technique, one-and two-dimensional graphene
metasurfaces are homogenized both at the fundamental frequency (FF) and second …

[HTML][HTML] Temporal coupled-mode theory in nonlinear resonant photonics: From basic principles to contemporary systems with 2D materials, dispersion, loss, and gain

T Christopoulos, O Tsilipakos, EE Kriezis - Journal of Applied Physics, 2024 - pubs.aip.org
Temporal coupled-mode theory (CMT) is an acclaimed and widely used theoretical
framework for modeling the continuous-wave response and temporal dynamics of any …