Waveguides in polycrystalline diamond for mid-IR sensing

• DOI: 10.1364/ome.6.001286
• Publication Date: 2016-03-22T14:09:15Z
• Authors: Mikael Malmström; Mikael Karlsson; Pontus Forsberg; Yixiao Cai; Fredrik Nikolajeff; Fredrik Laurell
• Keywords: 0103 physical sciences; 02 engineering and technology; 0210 nano-technology; 01 natural sciences

8 mm long channel waveguides were manufactured in polycrystalline diamond with inductively coupled plasma etching and characterized terms of mode-profile propagation loss the 1.5 – 3.4 μm spectral region. As proof principle, evaluated an evanescent field sensing setup targeting CH absorption peak isopropanol at ~3.4 μm, showing good agreement numerical finite element simulations.