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Article Dans Une Revue EPL - Europhysics Letters Année : 2023

Remote terahertz spectroscopy from extended two-color plasma filaments: The ALTESSE 2 project

Résumé

Coherent time-domain spectroscopy (TDS) using terahertz radiation is valuable for fundamental science, security, and medical applications. This study investigates the performance of air-biased coherent detection terahertz spectroscopy (ABCD-THz) when an extended plasma filament is created in the air over long distances. We report on the latest results obtained within the follow-up of the ALTESSE project (Bergé L. et al ., EPL , 126 (2019) 24001) whose objective is to measure a set of spectral signatures characterizing suspicious materials over meter-long distances. As one of the most critical steps towards routinely applying this technique, we verified the feasibility of a remote THz time-domain spectroscopy by loosely focusing two-color ultrashort laser pulses at more than 3 meters from the laser source. The absorption spectra of amino acids and explosives analyzed in such a filamentation geometry are compared with those obtained using a standard ABCD scheme where the plasma is generated at much shorter distances of ∼ 30 cm.
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Dates et versions

hal-04148440 , version 1 (03-07-2023)

Identifiants

Citer

A. Talbi, B. Zhou, P. Jepsen, Stefan Skupin, A. Courjaud, et al.. Remote terahertz spectroscopy from extended two-color plasma filaments: The ALTESSE 2 project. EPL - Europhysics Letters, 2023, 143 (1), pp.10001. ⟨10.1209/0295-5075/acdc4c⟩. ⟨hal-04148440⟩
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