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Progress In Electromagnetics Research
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ANALYSIS OF THE SURFACE MAGNETOPLASMON MODES IN THE SEMICONDUCTOR SLIT WAVEGUIDE AT TERAHERTZ FREQUENCIES

By F. Kong, K. Li, H. Huang, B.-I. Wu, and J. A. Kong

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Abstract:
The propagation properties of surface plasmon polaritons (SPP) modes and surface magnetoplasmon polaritons (SMP) modes in a semiconductor slit waveguide are analyzed by the effective dielectric constant approach, and the interaction of the external magnetic field with the dispersion properties and field distributions of SMP modes in the Voigt configuration are emphasized in our analysis. Both the symmetric structure and the asymmetric structure are discussed in details. In contrast to the SPP modes which have one propagation band below the plasmon frequency only, the SMP modes have both the low-frequency propagation band below the plasmon frequency and the high-frequency propagation band above the plasmon frequency. When the external magnetic field increases, the two bands of the SMP modes will separate further in frequency, and the even symmetric distribution of the fundamental mode, which usually associates with the SPP mode, will be destroyed. These results can provide some guidance for the design of the tunable semiconductor waveguide in the terahertz regime.

Citation:
F. Kong, K. Li, H. Huang, B.-I. Wu, and J. A. Kong, " analysis of the surface magnetoplasmon modes in the semiconductor slit waveguide at terahertz frequencies ," Progress In Electromagnetics Research, Vol. 82, 257-270, 2008.
doi:10.2528/PIER08031224
http://www.jpier.org/PIER/pier.php?paper=08031224

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