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Information × Registration Number 0216U001792, 0114U004665 , R & D reports Title High-frequency and optical phenomena in hybrid plasmonic structures based on A3B5 semiconductors. popup.stage_title Head Poroshin V.N., Registration Date 20-04-2016 Organization Institute of physics NASU popup.description2 Presented are results of investigations on interaction between the terahertz electromagnetic waves and hybrid plasmonic structures consisting of the subwave metallic grating and semiconductor heterostructure with the high mobility electron 2D-gas. The heterostructures with profiled surface are also analysied. Behavior of the transmission and reflection coefficents, losses, features of the near-field distribution are studied. It is shown that frequency dependences of the transmission, reflection and absorption coefficients in the terahertz range have a number of resonance extrema connected with excitement of collective electron oscillations - 2D plasmon gas. The frequency and intensity of plasmon resonances change depending on the filling factor of the metallic grating and 2D-gas parameters. The near-field of the system has a quasi-quadrupole structure caused by the incident wave excitement of the opposite charges at the ends of grating strips and the mirror image of these charges in the 2D gas layer. It is shown that effects of local concentration and electric field amplification considerably grow as compared to the single metallic grating. Besides, at frequences close to the plasmon resonance these effects may grow yet by an order of magnitude. The near-field is concentrated in the region between the grating metallic strip and 2D-gas region lying beneath it. Using the Kirchhoff law for the thermal emission and developed theory of interaction between the electromagnetic wave and a sample with profiled surface, the experimental emission spectra of the epitaxial GaN layers with profiled surface were explained and quantitatively described. Possibility to excite spatially and frequency-ordered ("coherent") emission of electromagnetic waves in the THz range has been demostarted. Based on these results, the model of detector for the terahertz range is proposed. Product Description popup.authors Вайнберг Віктор Володимирович Коротєєв Вадим Кочелап Вячеслав Олександрович Порошин Володимир Миколайович popup.nrat_date 2020-04-02 Close