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arXiv · 1008.0251

Terahertz radiation due to random grating coupled surface plasmon polaritons

T. V. Shubina·N. A. Gippius·V. A. Shalygin·A. V. Andrianov·S. V. Ivanov
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Abstract

We report on terahertz (THz) radiation under electrical pumping from a degenerate semiconductor possessing an electron accumulation layer. In InN, the random grating formed by topographical defects provides high-efficiency coupling of surface plasmon polaritons supported by the accumulation layer to the THz emission. The principal emission band occupies the 2-6 THz spectral range. We establish a link between the shape of emission spectra and the structural factor of the random grating and show that the change of slope of power dependencies is characteristic for temperature-dependent plasmonic mechanisms. The super-linear rise of a THz emission intensity on applied electric power provides advantage of such materials in emission yield.

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T. V. Shubina, N. A. Gippius, V. A. Shalygin, A. V. Andrianov, S. V. Ivanov. 2010-08-02. Terahertz radiation due to random grating coupled surface plasmon polaritons. https://doi.org/10.1103/physrevb.83.165312

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