Highly precise thermal imprinting of microstructures for optical sensing application

authored by

Yash Bhatia, Lei Zheng, Lukas Steinbach, Axel Günther, Andreas Schneider, Bernhard Roth

Abstract

This study investigates the improvement of planar waveguide performance for advanced optical sensors by optimized hot embossing on polymethylmethacrylate (PMMA) substrates with Ormocomp photoresist and integration of zeolite imidazole framework-8 (ZIF-8). We have produced planar waveguides with significantly reduced optical transmission losses of 2.32 dB/cm which is suited for the sensing application intended. The integration of ZIF-8-based optical films improves carbon dioxide (CO2) sensing, with adsorption taking ~19 seconds and desorption ~28 seconds, demonstrating excellent reversibility of gas adsorption/desorption cycles. Future research will investigate different photoresists to further optimize waveguide performance and expand application cases. This study may thus lay the foundation for the next optical sensing technologies in the biomedical, environmental, and industrial fields based on functionalized planar-optical waveguide arrays.

Organisation(s)

PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Hannover Centre for Optical Technologies (HOT)
Institute of Inorganic Chemistry
Inorganic Solid State and Materials Chemistry group
Photonics - Optical Analytics, Sensing and Spectroscopy

External Organisation(s)

Technische Universität Braunschweig

Type

Conference contribution

Publication date

19.03.2025

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials, Condensed Matter Physics, Computer Science Applications, Applied Mathematics, Electrical and Electronic Engineering

Electronic version(s)

https://doi.org/10.1117/12.3043113 (Access: Closed)