Abstract
We study energy transfer among an array of identical finite-width parallel-plate waveguides in close proximity, via evanescent wave coupling of broadband terahertz waves. We observe stronger coupling with larger plate separations and longer propagation paths. This work establishes a platform to investigate new opportunities for THz components and devices based on evanescent wave coupling.
Highlights
In this brief introduction, background information will be provided to give context to the supporting foundation of this experiment.1.1
We exploit the symmetry of the problem to model only one quarter of the waveguide array, using perfect electric conductor (PEC) boundary conditions horizontally and perfect magnetic conductor (PMC) boundary conditions vertically on the inside boundaries [11]
In order to characterize mutual coupling between THz finite-width parallel-plate waveguides (PPWGs), we studied two variables: plate separation (b) and propagation length (L)
Summary
Until the late 1990’s, the spectrum of frequencies from about 10GHz to 10THz had been known as the “Terahertz Gap.” Since this time, the gap has rapidly been filling in with new terahertz generation and detection techniques, alongside new devices that enable better control of terahertz wave from waveguide to metamaterials. Until the late 1990’s, the spectrum of frequencies from about 10GHz to 10THz had been known as the “Terahertz Gap.” Since this time, the gap has rapidly been filling in with new terahertz generation and detection techniques, alongside new devices that enable better control of terahertz wave from waveguide to metamaterials. One phenomenon that had been investigated was coupling to a metal wire waveguide This successful demonstration of terahertz wave coupling forms the basis of a terahertz endoscope, a probe that can image even at an angle of 90 [1]. 4 this paper, we were curious to further investigate wave coupling in the terahertz regime Terahertz has such a rich potential because it pulls from the neighboring frequency worlds of microwaves and infrared optics. We look to optical evanescent wave coupling as a launching pad to understand THz coupling
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