Tubular Optofluidics

• Applicant: Professor Dr. Hans Zappe
• Subject Area: Microsystems
• Term: from 2015 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 259171179

In the first two years of Tubular Optofluidics, it was shown that three dimensional optofluidic systems in a tubular geometry are feasible. A tunable lens; an astigmatism-tunable lens; and a rotational fluidic prism and scanner were developed and demonstrated.In this proposed one-year follow-up research project, we propose to research and develop two further aspects of Tubular Optofluidics, namely the incorporation of a tunable aperture and the design and demonstration of a tunable multi-element zoom system.An aperture is an essential component in most optical systems, and tunability of the aperture diameter is essential for tunable systems. For this reason, a fluidic aperture tuned by electrowetting is planned for the first work phase, designed to be integrated with the previously realized optofluidic elements. The aperture will be based on a buried electrode in the tubular foil, an actuation structure similar to that of the lens and prism. The final and crowning step for the project is then the design and realizationof a fully functional multi-element fluidic zoom system using the tunable components developed in the earlier stages. Such a multi-component optofluidic system has never been demonstrated previously and its successful implementation would provide the basis for entirely new forms of highly versatile optofluidic microsystems.The proposed concept will rely on the integration of the tunable optofluidic elements actuated by electrowetting. The multi-component system, designed with two tunable fluidic lens elements, will require extensive simulation and design, using analytical modeling as well as ray-tracing simulation. Fabrication of an advanced electrode foil as well as development of highly controlled liquid dosing processes will be essential parts of its realization. When completed, the tunable all-liquid optofluidic zoom system will be the first of its kind ever demonstrated, showing the power of three-dimensional optofluidic technology.

• DFG Programme: Research Grants