Shaping of electromagnetic fields for THz plasmonics

A. Edelmann; S. Helfert; J. Jahns

doi:10.1117/12.2036275

25 February 2014 Shaping of electromagnetic fields for THz plasmonics

A. Edelmann, S. Helfert, J. Jahns

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.

Citation Download Citation

A. Edelmann, S. Helfert, and J. Jahns "Shaping of electromagnetic fields for THz plasmonics", Proc. SPIE 8999, Complex Light and Optical Forces VIII, 899913 (25 February 2014); https://doi.org/10.1117/12.2036275

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