Sub-terahertz 2D Photonic Crystal Waveguides for Fluid Sensing Applications

We present experiments on 2D photonic crystal waveguides for fluid sensing applications. Using a standard machining process, photonic crystal waveguides for the sub-terahertz (0.1 THz) frequency range are fabricated. The insertion of fluids into the active region of the crystal leads to a change of the photonic band gap properties. We present results for different non-polar liquids, which are in the good agreement with simulations.