biostudies-literatureUnknown12(1)Papamakarios STHz metamaterials present unique opportunities for next-generation technologies and applications as they can fill the "THz gap" originating from the weak response of natural materials in this regime, providing a variety of novel or advanced electromagnetic wave control components and systems. Here, we propose a novel metamaterial design made of three-dimensional, metallic, "cactus-like" meta-atoms, showing electromagnetically induced transparency (EIT) and enhanced refractive index sensing performance at low THz frequencies. Following a detailed theoretical analysis, the structure is realized experimentally using multiphoton polymerization and electroless silver plating. The experimental characterization results obtained through THz time domain spectroscopy validate the corresponding numerACS photonics87-97https://www.ebi.ac.uk/biostudies/studies/S-EPMC11748748biostudies-literatureCactus-like Metamaterial Structures for Electromagnetically Induced Transparency at THz frequencies.PMC11748748Manousidaki MFarsari MTzortzakis SZyla GKoulouklidis ADKatsantonis IKafesaki MPapamakarios SDaskalaki CTsilipakos OfalseCactus-like Metamaterial Structures for Electromagnetically Induced Transparency at THz frequencies.THz metamaterials present unique opportunities for next-generation technologies and applications as they can fill the "THz gap" originating from the weak response of natural materials in this regime, providing a variety of novel or advanced electromagnetic wave control components and systems. Here, we propose a novel metamaterial design made of three-dimensional, metallic, "cactus-like" meta-atoms, showing electromagnetically induced transparency (EIT) and enhanced refractive index sensing performance at low THz frequencies. Following a detailed theoretical analysis, the structure is realized experimentally using multiphoton polymerization and electroless silver plating. The experimental characterization results obtained through THz time domain spectroscopy validate the corresponding numer2025-01-01T00:00:00Z2025 Jan2025-04-04T20:56:33.333Z2025-04-04T20:56:33.333ZS-EPMC117487483983934310.1021/acsphotonics.4c01179