Sven Becker, Tassilo Fip, Corey Shemelya, Marco Rahm,
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10719/107191H/Confined-terahertz-surface-waves-on-meta-surfaces-and-Goubau-lines/10.1117/12.2320602.short
Integrated circuits revolutionized electronics
long time ago and paved the way towards minimized microprocessors today. In
analogy, plasmonics aims at the creation of highly integrated optical networks
on a small chip that enable the implementation of ultra-small sensors or
optical processors. In the terahertz frequency regime, we investigate the
propagation of tightly bound pure surface waves on specifically designed
meta-surfaces. While most presented metasurfaces on a thin film in the
literature support waveguide mode propagation in the thin film substrate, whose
evanescent electromagnetic fields form the surface waves at the waveguide
boundaries, we observed pure surface waves that are not coupled to a waveguide
mode in the thin film. Such meta-surfaces are particularly advantageous for use
as surface sensors, since the surface waves carry most of their energy in the
space between the surface and air and almost no energy in the thin film
substrate. This is in strict contrast to most of the presented meta-surfaces in
literature so far, which guide a significant part of unusable energy in the
inaccessible region of the substrate. Furthermore, we study structures of
Goubau lines and meta-surfaces that combine excellent spectrally broadband
terahertz surface wave guiding with frequency-selective meta-surface areas and
meta-surface sub-wavelength resonators on a chip. In detail, we investigate the
coupling efficiency between Goubau lines and meta-surfaces.
No comments:
Post a Comment
Please share your thoughts. Leave a comment.