Sensibilidad en estructuras de guías de onda Strip y Rib con material SU-8 en Interferómetro Mach Zehnder
DOI:
https://doi.org/10.15665/rp.v24i1.3848Keywords:
Mach Zehnder Interferometer, photonics, sensitivity, SU-8, waveguides.Abstract
Silicon technology, widely used in photonics, is expensive due to the fabrication processes and infrastructure required. In contrast, polymers offer a cheaper and more versatile alternative for the fabrication of photonic devices. Therefore, companies are looking for new technologies and methodologies to develop photonic interferometers with lower cost and higher efficiency, driving research in innovative materials such as polymers. The objective of the article is to compare the sensitivity of Strip and Rib waveguide structures with SU-8 material implemented in a Mach Zehnder Interferometer. The methodology contemplates ten phases called geometry definition, physical phenomenon selection, waveguide selection, parameters definition, simulation area definition, finite element simulation, propagation modes analysis, cut-off curves analysis, interferometer design and Mach Zehnder Interferometer sensitivity analysis. As a result, the Strip structure with core height of 220 nm achieves the highest sensitivity of 57.51× rad/RIU, and a detection limit of 7.10× RIU. It is concluded that the Strip type structure, fabricated from SU-8 material, is a viable alternative for precision optical sensors, with the additional advantage in reduced fabrication costs of the Mach Zehnder Interferometer.
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