Filters

2018 - 20192

More filters

2021 - 20232
Reset filters

Settings

Author: Steglich, Patrick × Publisher: Basel : MDPI ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Comparative Study of Nano-Slot Silicon Waveguides Covered by Dye Doped and Undoped Polymer Cladding
    (Basel : MDPI, 2018) Bondarenko, Siegfried; Villringer, Claus; Steglich, Patrick
    Nonlinear optical dyes doped in optical polymer matrices are widely used for electro-optical devices. Linear optical properties change with dye concentration, which leads to a change in modal properties, especially in nano-structured integrated waveguides such as silicon slot-waveguides. Here, we investigate the influence of a nonlinear optical dye on the performance of a silicon-organic hybrid slot-waveguide. A simulation study of the modal and optical confinement properties is carried out and dependence of the structural parameters of the slot-waveguide and the organic cladding material is taken into account. As cladding material, a guest-host polymer system is employed comprising the nonlinear optical dye Disperse Red 1 (DR1) doped in a poly[methyl methacrylate] (PMMA) matrix. The refractive indices of doped and undoped PMMA were deduced from ellipsometric data. We present a guideline for an optimized slot-waveguide design for the fabrication in silicon-on-insulator technology giving rise to scalable, high-performance integrated electro-optical modulators.
  • Thumbnail Image
    Item
    Optical biosensors based on silicon-on-insulator ring resonators: A review
    (Basel : MDPI, 2019) Steglich, Patrick; Hülsemann, Marcel; Dietzel, Birgit; Mai, Andreas
    Recent developments in optical biosensors based on integrated photonic devices are reviewed with a special emphasis on silicon-on-insulator ring resonators. The review is mainly devoted to the following aspects: (1) Principles of sensing mechanism, (2) sensor design, (3) biofunctionalization procedures for specific molecule detection and (4) system integration and measurement set-ups. The inherent challenges of implementing photonics-based biosensors to meet specific requirements of applications in medicine, food analysis, and environmental monitoring are discussed. © 2019 by the authors.