thz_waveguides(文件)
【正文】 istry methods, a metal or dielectric layer is deposited inside a silicon or polymer hollow waveguide. ? It has been shown in the midIR region that hollow waveguides suffer a bending loss of 1/R, where R is the radius of curvature. It is possible to eliminate this effect with photonic bandgap structures. ? The losses in Cu hollow waveguides can be significantly reduced if a dielectric coating of the correct optical thickness is deposited over the metallic layer. Recent waveguides ?Hollow polymer waveguides with inner metallic layers Hidaka, “Optical information, data processing and storage, and laser munication technologies”, Proc. SPIE, 5135, 11 (2022) 8 mm bore hollow waveguide with an inner wall of ferroelectric Polyvinylidene Fluoride (PVDF) a = cm1 at 1 THz With Cu inner layer, a ~ cm1 at 1 THz Recent waveguides ? Ferroelectric hollow core allplastic Bragg fibers Skorobogatiy, Appl. Phys. Lett., 90, 113514, (2022) Recent waveguides ?Metal wire Wang, Nature, 432, (2022) Stainless steel wire with a diameter of 900 mm a cm1 However, coupling efficiency is (very) low Non polarizati
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