Terahertz systems comprising rolled-up metal microhelices and GaAs slabs

The systems comprising arrays of microhelical resonators, GaAs slabs and air spacers were formed with use of the rolling-up and 3D printing technologies and studied. The systems demonstrate the interplay of the half-wave resonance of helices, waveguide and Fabry-Perot resonances, which result in ultrasharp high regular peaks in polarization spectra. The background mechanisms of the peaks arising in different systems are discussed.