Full text loading...
(Color online) Scheme of THz-to-IR converter (left) and top view of topological pattern of split-ring resonators (right). FSS––frequency selective surface (metasurface), PP––polypropylene, “GL”––“ground” layer, EL––IR emissive layer, AIS––artificial impedance surface.
(Color online) Absorptivity spectra of the absorber for two orthogonal polarizations.
(Color online) Terahertz imaging system based on THz-to-IR converter and IR bolometric camera. BWO––backward wave oscillator. Lens in front of converter is optional.
(Color online) IR image of unfocused BWO beam at resonant frequency 0.3 THz. Converter diameter––32 mm. Half-width of the beam is around 16 mm. Image cross-section is shown below.
(Color online) Image transformation of the focused BWO beam with linear polarization during converter rotation. Image cross-section is shown below. Converter resonant frequency––0.3 THz. Beam polarization is perpendicular to SRR gaps at the beginning of rotation and parallel to SRR gaps at the end of rotation (enhanced online) [URL: http://dx.doi.org/10.1063/1.3607474.1].10.1063/1.3607474.1
Real-time free movement of the focused beam along the converter surface (enhanced online) [URL: http://dx.doi.org/10.1063/1.3607474.2].10.1063/1.3607474.2
Article metrics loading...