|Terahertz probing of sunflower leaf multilayer organization |
Auteur(s): Abautret Yannick, Coquillat D., Zerrad Myriam, Buet Xavier, Bendoula Ryad, Soriano Gabriel, Brouilly Nicolas, HERAN Daphné, Grezes-Besset Bruno, Chazallet Frédéric, Amra Claude
(Article) Publié: Optics Express, vol. 28 p.35018-35037 (2020)
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We analyze the multilayer structure of sunflower leaves from Terahertz data measured in the time-domain at a ps scale. Thin film reverse engineering techniques are applied to the Fourier amplitude of the reflected and transmitted signals in the frequency range f < 1.5 Terahertz (THz). Validation is first performed with success on etalon samples. The optimal structure of the leaf is found to be a 8-layer stack, in good agreement with microscopy investigations. Results may open the door to a complementary classification of leaves.