High permittivity processed SrTiO3 for metamaterials applications at terahertz frequencies

Cyrielle Dupas (1) , Sophie Guillemet-Fritsch (2) , Pierre-Marie Geffroy (1) , Thierry Chartier (1) , Matthieu Baillergeau (3) , Juliette Mangeney (3) , Jean-François Roux (4) , Jean-Pierre Ganne , Simon Marcellin (5) , Aloyse Degiron (5) , Eric Akmansoy (5)

1 IRCER-AXE1 - IRCER - Axe 1 : procédés céramiques
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 LPA - Laboratoire Pierre Aigrain
4 IMEP-LAHC - Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation
5 IEF - Institut d'électronique fondamentale

High permittivity SrTiO 3 for the realization of all-dielectric metamaterials operating at terahertz frequencies was fabricated. A comparison of different processing methods demonstrates that Spark Plasma Sintering is the most effective sintering process to yield high density ceramic with high permittivity. We compare this sintering process with two other processes. The fabricated samples are characterized in the low frequency and in the terahertz frequency ranges. Their relative permittivities are compared with that of a reference SrTiO 3 single crystal. The permittivity of the sample fabricated by Spark Plasma Sintering is as high as that of the single crystal. The role of the signal-to-noise ratio in the measurements at terahertz frequency is detailed.

Domaines: Sciences de l'ingénieur [physics]

Cyrielle Dupas, Sophie Guillemet-Fritsch, Pierre-Marie Geffroy, Thierry Chartier, Matthieu Baillergeau, et al.. High permittivity processed SrTiO3 for metamaterials applications at terahertz frequencies. Scientific Reports, 2018, 8, pp.15275. ⟨10.1038/s41598-018-33251-y⟩. ⟨hal-01908896⟩