Figure 2
From: Massively Sub-wavelength Guiding of Electromagnetic Waves
The Fourier amplitude as a function of frequency and wavevector along the chain of spirals for geometries with different numbers of vertices.
The dispersion relations of the guided modes supported by these ultra-thin connected spiral geometries are clearly evident. Also shown on the plots as blue lines are the scattered and unscattered light lines. Clockwise from top-left: 1, 3, 5 and 7 vertices.
