Title :
Low-Loss Mid-Infrared SOI Slot Waveguides
Author :
Penades, Jordi Soler ; Khokhar, Ali Z. ; Nedeljkovic, Milos ; Mashanovich, Goran Z.
Author_Institution :
Optoelectron. Res. Centre, Univ. of Southampton, Southampton, UK
Abstract :
Mid-infrared sensing is a field that has recently attracted attention due to the potential to reach the fingerprint region for several chemical compounds, allowing enhanced sensitivity. To further enhance the sensitivity of photonic sensors slot waveguides can be used as waveguides as the electric field amplitude can be greatly increased in the gap region. In this letter, we present silicon on insulator slot waveguides with a 1.4 ± 0.2 dB/cm propagation loss at 3.8 μm wavelength, as well as strip to slot transitions with a loss of 0.09 ± 0.01 dB/transition and slot bends with a loss of 0.18 dB/bend.
Keywords :
infrared detectors; optical losses; optical waveguides; silicon-on-insulator; chemical compounds; electric field amplitude; fingerprint region; gap region; loss 0.18 dB; low-loss mid-infrared SOI slot waveguides; mid-infrared sensing; photonic sensor slot waveguides; propagation loss; silicon on insulator slot waveguides; slot bends; strip to slot transitions; wavelength 3.8 mum; Loss measurement; Optical waveguides; Photonics; Propagation losses; Sensors; Silicon; Waveguide discontinuities; Silicon; infrared sensors; optical waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2414791
