Abstract

The goal of this technical note was to compare experimentally and via simulation of eight substrate-integrated hollow waveguide (iHWG) designs, and to predict promising future iHWG structures in lieu of experiments. The iHWGs differed in their geometry (i.e., inlet funnel cross-section and inner channel cross-section), as well as in their material properties (i.e., type of metal, polish of inner channel). Experimentally, calibration functions of isobutane as a model analyte were determined, and the analytical figures of merit, i.e., signal-to-noise ratio, limit of detection, were evaluated for each iHWG. Evaluation of the amount of radiation incident at the real-world and simulated detector revealed that experiment and simulation were in excellent agreement. While material and quality of the inner channel wall did not have a significant influence on the performance, the iHWG geometry profoundly affected the performance in terms of light throughput: Increasing the inlet funnel dimensions and the inner channel cross-section benefits light throughout, and thus, the analytical signal. Based on these results, simulations of not yet fabricated iHWGs were performed and promising new iHWG structures were suggested.

© 2019 The Author(s)

Silicon substrate-integrated hollow waveguide for miniaturized optical gas sensing

Shaonan Zheng, Hong Cai, Linfang Xu, Nanxi Li, Zhonghua Gu, Yao Zhang, Weiguo Chen, Yanyan Zhou, Qingxin Zhang, and Lennon Yao Ting Lee
Photon. Res. 10(1) 261-268 (2022)

iBEAM: substrate-integrated hollow waveguides for efficient laser beam combining

Julian Haas, Michael Pleyer, Josephine Nauschütz, Johannes Koeth, Markus Nägele, Olga Bibikova, Tatiana Sakharova, Viacheslav Artyushenko, and Boris Mizaikoff
Opt. Express 27(16) 23059-23066 (2019)

Flexible terahertz gas sensing platform based on substrate-integrated hollow waveguides and an opto-electronic light source

Dominik Theiner, Benedikt Limbacher, Michael Jaidl, Marie Ertl, Michael Hlavatsch, Karl Unterrainer, Boris Mizaikoff, and Juraj Darmo
Opt. Express 31(10) 15983-15993 (2023)

Precise determination of the optical properties of turbid media using an optimized integrating sphere and advanced Monte Carlo simulations. Part 2: experiments

Florian Bergmann, Florian Foschum, Ralf Zuber, and Alwin Kienle
Appl. Opt. 59(10) 3216-3226 (2020)

Zirconia dental implants degradation by confocal Raman microspectroscopy: analytical simulation and experiments

Nadia Djaker, Claudine Wulfman, Michaël Sadoun, and Marc Lamy de la Chapelle
Biomed. Opt. Express 4(5) 725-731 (2013)