Abstract
Surface plasmon polaritons in n-GaN are investigated. Experiments on optical reflection demonstrate the possibility of surface plasmon polariton excitation on the surface of the grating structure using terahertz radiation. Study of terahertz radiation emission under lateral electric field shows that the scattering of hot surface plasmon polaritons on the grating makes a significant contribution to the radiation intensity. In the certain spectral range this emission mechanism prevails.
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