BRICKED SUB-WAVELENGTH PERIODIC WAVEGUIDE, MODAL ADAPTER, POWER DIVIDER AND POLARISATION SPLITTER THAT USE SAID WAVEGUIDE

摘要

Disclosed are a bricked sub-wavelength periodic waveguide and a modal adapter, power divider and polarisation splitter that use said waveguide. The waveguide (600) comprises blocks (601, 602) disposed periodically with a period "Lz" on a substrate (603) and which alternate with a covering material (604). The first blocks (601) have a width "ax" and the second blocks (602) have a width "bx", alternating on the substrate (603) according to a period "Lx", the second blocks (602) being displaced a distance "dz" the first blocks (601) in the direction of propagation. Also disclosed are a modal adapter (1100), a power divider (1200) and a polarisation splitter (1500) that all use the periodic waveguide (600) and can operate with larger wave periods without leaving the sub-wavelength regime.