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We report an experimental study of the electrical properties of nickel cobalt ferrites (NiCo) in the terahertz (THz) frequency band. The study is motivated by the potential of NiCo and other magnetic ceramics for the fabrication of active and passive devices for THz wave communications. The optical constants, dielectric function and loss tangent of NiCo with various Ni/Co ratios have been measured...
We present coherent Raman spectroscopy of DMSO/water mixtures in the terahertz (THz) frequency region. In the measurements we use the spectral focusing technique with frequency chirped optical pulses, which enables us to measure both the stimulated Raman gain and loss signal in a wide THz frequency range from 0.1 to 25 THz. The observed coherent Raman spectra of [DMSO/water] mixtures show nonlinear...
We have developed a wide frequency range tunable continuous-wave terahertz signal generator (CW THz SG) on the principle of difference frequency generation (DFG) via non-collinear phase matching in a gallium phosphide (GaP) crystal. The GaP CW THz SG has a wide frequency range, high accuracy, high stability and easy operation/maintenance. A spectrometer working as a continuous system was realized...
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