Development of thick metal mesh THz-filters by LIGA-technology for high-power applications at Novosibirsk terahertz FEL

1-D and 2-D metal mesh based quasi-optical selective components for high-power applications at Novosibirsk terahertz FEL

“…Augmentation of low-frequency attenuation can be achieved by increasing number of used meshes or by increase of single mesh thickness resulting in appearance of a waveguide cut-off effect. In prospect we plan to produce thick substrate-free single mesh THz-filters with thickness compared to radiation wavelength by methods of a LIGA-technique [4]. Another way of increasing out-off-band rejection during harmonics filtration using a minimal number of thin metal meshes is employment of "capacitive" resonant meshes.…”

Terahertz Sensing of Thin Poly(ethylene Terephthalate) Film Thickness Using a Metallic Mesh

“…4,5) The metallic-mesh transmission properties, which depend on geometric parameters, such as the shape and size of the openings and the grid constant, have also been studied extensively. [6][7][8] This is because it has become easy to fabricate sophisticated, arbitrarily shaped metallic meshes inexpensively because of spectacular improvements in processing techniques. The metallic-mesh transmission spectrum has long been known to be acutely affected by the refractive index of the material inside and above the metallic-mesh openings.…”