期刊
OPTICS EXPRESS
卷 17, 期 19, 页码 17088-17101出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.017088
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资金
- National Science Foundation
- Korean Government (MEST) [R11-2008-095-01000-0]
- National Research Foundation of Korea [2008-0062257] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Direct For Mathematical & Physical Scien
- Division Of Physics [0757680] Funding Source: National Science Foundation
The Zenneck THz surface wave (Z-TSW) on metals is discussed with respect to its difficulty in generation and measurement. The spatial collapse of the extent of the Z-TSW evanescent field, upon the addition of a sub-wavelength dielectric layer on the metal surface, is explained by a simple model, in good agreement with exact analytical theory. Experimental measurements of the THz surface wave on an aluminum surface covered with a 12.5 mu m thick dielectric layer have completely characterized the resultant single-mode dielectric layer THz surface wave (DL-TSW). The measured frequency-dependent exponential fall-off of the evanescent wave from the surface agrees well with theory. The DL-TSW frequency-dependent absorption coefficient, phase velocity, group velocity and group velocity dispersion have been obtained. These guided-wave parameters compare favorably with other guided wave structures. (C) Optical Society of America
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