Articles | Volume 11, issue 2
Regular research article
09 Aug 2022
Regular research article |  | 09 Aug 2022

Fabrication of integrated polysilicon waveguides for mid-infrared absorption sensing

Gerald Stocker, Cristina Consani, Pooja Thakkar, Clement Fleury, Andreas Tortschanoff, Khaoula-Farah Ourak, Gerald Pühringer, Reyhaneh Jannesari, Parviz Saeidi, Elmar Aschauer, Ulf Bartl, Christoph Kovatsch, Thomas Grille, and Bernhard Jakoby


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Short summary
We motivate how integrated waveguides (WGs) can be part of an on-chip non-dispersive infrared sensor system for environmental sensing. We report the hurdles in maintaining WG quality when integrating emitter and detector structures on the same chip. Thus, we introduce the concept of how to determine the intrinsic loss and a process scheme to protect WG structures from damage caused during fabrication. This could pave the way to systems for environmental sensing with a minimal footprint.