Cavity-based Terahertz Photoconductive Sources For Real-Time Terahertz Imaging

Paper (INST6)

Mon, 09 Nov 2020 06:30pm to 06:45pm

Room: Seneca

Attend in Zoom

Optically-driven photoconductive switches are one of the predominant sources currently used in terahertz imaging systems. However, owing to their low average powers, only rasterbased images can be taken, resulting in slow acquisition times. In this work, we show that by placing a photoconductive switch within a metal-metal cavity, we generate absolute average THz powers of 181 μW. The structure permits an enhancement of the
average power by almost one order of magnitude compared to a standard structure, whilst conserving a broadband spectral response. We demonstrate real-time THz imaging using this source, with the broadband spectrum permitting to eliminate diffraction artefacts

Presenters and Authors Info

Presenter: Anonymous

Authors: Hawecker, Jacques; Maussang, Kenneth; MINASYAN, Amaly; Palomo, José; Manceau, Jean-Michel; Colombelli, Raffaele; Sagnes, Isabelle; Tignon, Jerome; Mangeney, Juliette; Dhillon, Sukhdeep

Centre de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris Sud, Université Paris-Saclay, i2s, Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris,, Laboratoire de Physique de l’Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris