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Quasi-static and propagating modes in three-dimensional THz circuits

Authors :
Jeannin, Mathieu
Gacemi, Djamal
Vasanelli, Angela
Li, Lianhe
Davies, Alexander Giles
Linfield, Edmund
Biasiol, Giorgio
Sirtori, Carlo
Todorov, Yanko
Publication Year :
2020

Abstract

We provide an analysis of the electromagnetic modes of three-dimensional metamaterial resonators in the THz frequency range. The fundamental resonance of the structures is fully described by an analytical circuit model, which not only reproduces the resonant frequencies but also the coupling of the metamaterial with an incident THz radiation. We also evidence the contribution of the propagation effects, and show how they can be reduced by design. In the optimized design the electric field energy is lumped into ultra-subwavelength ($\lambda$/100) capacitors, where we insert semiconductor absorber based on the collective electronic excitation in a two dimensional electron gas. The optimized electric field confinement is evidenced by the observation of the ultra-strong light-matter coupling regime, and opens many possible applications for these structures for detectors, modulators and sources of THz radiation.

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2002.09746
Document Type :
Working Paper
Full Text :
https://doi.org/10.1364/OE.391073