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We investigate thermal emission characteristics mediated by surface plasmon polaritons (SPPs) resonantly excited at a semiconductor-vacuum interface. The characteristic plasma and SPP resonant frequencies in the interval from 0.3 to 10 THz can be controlled with conventional doping densities. All of the cases under consideration (n-doped GaAs, GaN, and Si) demonstrate the spectral energy density in...
Using gases as the emitter and detector media in a THz system allows for good phase matching over the full terahertz range (0.3 to 10 THz), without interruptions from crystal phonon modes or other instrument artifacts. A heterodyne technique facilitates coherent measurement of the electric field waveform, enabling this technique to be used for time-resolved spectroscopy in which a single measurement...
The terahertz (THz) regime, generally considered to be 0.3-10 THz, is rich with emerging possibilities in sensing, imaging and wireless communications. Since it is non-ionizing and can exploit endogenous contrast mechanisms, it has particular potential for biological applications. These range from screening persons for concealed weapons to advanced biomedical diagnostics at the sub-cellular level...
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