25 February 2014 Shaping of electromagnetic fields for THz plasmonics
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Proceedings Volume 8999, Complex Light and Optical Forces VIII; 899913 (2014) https://doi.org/10.1117/12.2036275
Event: SPIE OPTO, 2014, San Francisco, California, United States
Abstract
The material characteristics in the THz-domain are an outstanding issue that challenge the development of suitable waveguides. It was shown that a simple metallic wires can provide waveguding with low attenuation and low dispersion. However, the need of an efficient coupling of free-space radiation limits the capabilities of the metallic wires. Here we suggest a coupling method which promise a significant increase in the coupling efficiency. We use the endfire-method which allows an excitation of the waveguide modes by direct illumination to the wire's front facet. The incident field is shaped in the field distribution by a spiral axicon and the polarization is modified by a sub-wavelength grating.
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A. Edelmann, S. Helfert, J. Jahns, "Shaping of electromagnetic fields for THz plasmonics", Proc. SPIE 8999, Complex Light and Optical Forces VIII, 899913 (25 February 2014); doi: 10.1117/12.2036275; https://doi.org/10.1117/12.2036275
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