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At present, most terahertz (THz) technologies rely on free propagation rather than waveguide transportation. These systems have limitations such as large diffraction, and bulky volume, THz waveguides provide a promising approach to overcome these hurdles. Bare metal wires, which support a plasmonic mode, on their surfaces in THz range, are one of good candidates for THz waveguides with low loss and...
The light beam with Laguerre-Gaussian (LG) mode has attracted remarkable attentions these days because of its unique features and possible applications [1]. This mode has a phase singularity at the center of the beam, and has phase distribution proportional to the angular coordinate. Because the phase front of this mode is twisted around the center of the beam, LG beam can transfer orbital angular...
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