Large area Terahertz digitated photoconductive antennas based on a single high resistivity metal and nanoplasmonic electrode - ENS - École normale supérieure
Article Dans Une Revue Photonics and Nanostructures - Fundamentals and Applications Année : 2024

Large area Terahertz digitated photoconductive antennas based on a single high resistivity metal and nanoplasmonic electrode

Anna de Vetter
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Chao Song
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Martin Mičica
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Jérôme Tignon
Juliette Mangeney
Sukhdeep Dhillon
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Résumé

Optical excited photoconductive antennas are a central technology for the Terahertz (THz) domain, crucial for both emitting and detecting THz radiation. This work proposes and experimentally realises a new approach in digitated photoconductive antennas (d-PCAs) based on a single digitated high resistivity metal contact with integrated resistances as voltage dividers. This permits a uniform applied electric field over a large surface area and a single step device processing procedure, simplifying the device realisation. This concept is further combined with digitated plasmonic nano-antennas that permits to enhance the light-matter interaction. Through femtosecond optical excitation of such structures, THz pulses can be generated efficiently through this device. Further, for the plasmonic d-PCA, the detected THz electric field of the device shows the effect of polarisation of the incident IR beam, highlighting the role of the nanostructured digitated contacts. This work is supported by electromagnetic simulations showing the optical and THz response of this new type of photoconductive antenna with integrated resistances.

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hal-04732999 , version 1 (11-10-2024)

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Anna de Vetter, Chao Song, Martin Mičica, Jérôme Tignon, Juliette Mangeney, et al.. Large area Terahertz digitated photoconductive antennas based on a single high resistivity metal and nanoplasmonic electrode. Photonics and Nanostructures - Fundamentals and Applications, 2024, 59, pp.101248. ⟨10.1016/j.photonics.2024.101248⟩. ⟨hal-04732999⟩
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