Dispersion of surface plasmons in InSb-gratings |
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Authors: | P. M. van den Berg J. C. M. Borburgh |
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Affiliation: | 1. Dept. of Electr. Eng., Div. of Electromagnetic Research, Delft University of Technology, Delft, The Netherlands
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Abstract: | The reflection of a monochromatic plane electromagnetic wave by a grating consisting of grooves in the surface of a semiconductor plasma (InSb) is investigated theoretically, in particular in that region of frequencies where the complex permittivity of the semiconductor plasma has a negative real part. From the numerically obtained reflection factor pertaining to anH-polarized incident wave, the excitation and the dispersion of surface plasmons at the boundary of the medium is discussed. The grating problem is rigorously formulated as a boundary value problem employing a Green's function technique. Numerical results pertaining to the reflection factor are presented for different grating parameters. |
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