SiN Sensors – Microring Resonators

In a rapidly developing society, time and costs have become important factors. This fact also increasingly affects the field of sensor technology. Compact optical analyzers should meet these requirements and realize a fast, cost-efficient and specific measurement of various chemical and biological substances. The application possibilities should cover many areas such as diagnostics, environmental analysis, life science and also food analysis.

The combination of SiN ring resonators functionalized with nucleic acid-based capture molecules (aptamers) can meet precisely these requirements. The proof of concept will be provided in this development project. For this purpose, two fields of application will be defined and demonstrators built for them.

Application in water analysis

The Problem:

The detection of bacteria and viruses in water is an important part of ensuring general health. For example, the analysis of water in wastewater treatment plants should provide information about possible covid-19 infection sources. The faster and more precise the desired result is available, the more accurately consequences can be drawn.


The Solution:

Direct measurement of the sought-after substance on site brings enormous time and economic advantages, as the detour via a laboratory is saved. Compared to current rapid tests based on color change, the aptamers used increase the accuracy and sensitivity and thus the significance of the result.


Other applications: Cyanobacteria, SARS-CoV-2, Legionella.

Markets: Environmental analysis, food industry

Lifestyle application

The Problem:

The lifestyle and life science market in Germany is constantly growing. Especially due to digital networking and the desire to be able to analyze as many parameters of one’s body as possible anytime and anywhere, cost-effective, mobile and networked measuring devices are desirable.


The Solution:

The ring resonators used in this project, functionalized with aptamers, enable fast and reliable measurement of the sought-after target. In combination with a WiFi enabled measurement device, the requirements of this social media driven market will be met.


Other applications: Vitamin D, ferritin, vitamin B12

Markets: Life science market, food industry (supplement industry), POCT

Out Partner


Philipp Jungmann