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29 papers · 1 filter
Screened topological plasmons in graphene plasmonic crystals
André Octávio Soares, Christos Tserkezis, N. M. R. Peres
We study topological effects in an one-dimensional plasmonic crystal formed by the screened plasmons emerging in a periodically modulated graphene sheet, placed on top of a metalli…
Plasmon polariton assisted second-harmonic generation in graphene
João M. Alendouro Pinho, Simão S. Cardoso, Yuliy V. Bludov +4
In this paper we present a theoretical examination of second-harmonic generation (SHG) in a graphene monolayer integrated within an attenuated total internal reflection (ATR) confi…
Time-resolved observation of magnon splitting into vortex gyration and Floquet spin waves
T. Devolder, R. Lopes Seeger, C. Heins +9
Forced excitations at frequencies in the range of the first order azimuthal spin waves of a magnetic disk in the vortex state are known to scatter into the vortex gyration mode, th…
Orbital Hall effect from orbital magnetic moments of Bloch states: the role of a new correction term
Tarik P. Cysne, Ivo Souza, Tatiana G. Rappoport
We present a rigorous derivation of the matrix elements of the orbital magnetic moment (OMM) of Bloch states. Our calculations include the Berry connection term in the k-derivative…
Impact of Surface Passivation on the Efficiency and High-speed Modulation of III-V GaAs/AlGaAs Nanopillar Array LEDs
Bejoys Jacob, João Azevedo, João Lourenço +3
III-V semiconductor nanolight sources with deep-subwavelength dimensions (1 m) are essential for miniaturized photonic devices such as nanoLEDs and nanolasers. However, thes…
Resonate-and-Fire Photonic-Electronic Spiking Neurons for Fast and Efficient Light-Enabled Neuromorphic Processing Systems
Andrew Adair, Dafydd Owen-Newns, Giovanni Donati +7
Neuromorphic computing seeks to replicate the spiking dynamics of biological neurons for brain-inspired computation. While electronic implementations of artificial spiking neurons…