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Communication Dans Un Congrès Année : 2024

From Bulk Toward Micro-Structured TiO_2 Ceramics for All-Dielectric Metamaterials at Terahertz Frequencies

Résumé

In this study, we aimed to develop high permittivity TiO2 ceramics ideal for the fabrication of All-Dielectric Meta- materials operational in the terahertz frequency. TiO2 ceramic pellets are fabricated from a commercial powder. A comparative analysis was conducted between Spark Plasma Sintering (SPS) and conventional sintering process. Characterizations were then carried out in the range of 0.2 to 1.4 THz using THz time-domain spectroscopy. We observed that the samples fabricated by the spark plasma sintering and post-annealing treatment exhibit a high refractive permittivity associated with minimal loss (ε′ ≈ 100 and tan δ <0.015). These characteristics make these samples optimal candidates for achieving a negative refractive index in all-dielectric metamaterials. In addition, two micro-structuring processes were investigated for the realization of metamaterials operating in the terahertz range: micro-molding and direct TiO2 etching by Inductively Coupled Plasma (ICP).
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Dates et versions

hal-04449962 , version 1 (09-02-2024)

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Djihad Amina Djemmah, Delphine Gourdonnaud, Pierre -Marie Geffroy, Jean-François Roux, Faycal Bouamrane, et al.. From Bulk Toward Micro-Structured TiO_2 Ceramics for All-Dielectric Metamaterials at Terahertz Frequencies. 18th European Conference on Antennas and Propagation, Mar 2024, Glasgow (Ecosse), France. ⟨10.23919/EuCAP60739.2024.10501288⟩. ⟨hal-04449962⟩
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