Figure 5
From: Massively Sub-wavelength Guiding of Electromagnetic Waves
Top: A schematic showing the lithographic fabrication method. A 50 μm thick polyester substrate coated with 18 μm of copper has the desired pattern printed on to it using a solid ink printer (laser printers can also be used). The printed pattern forms an etch mask and the unmasked copper is removed using ferric chloride. The ink mask is subsequently removed by solvent assisted abrasion. Bottom: Example of the fabricated samples showing spiral designs with 5, 7, 9 and 11 vertices.
