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Lipid Bilayer Based Optofluidic Len

We present the first optofluidic lens element based on a 4 nm thick lipid bilayer within a micromachined chip that is actuated by pressure. The lipid bilayer separates two liquids with different refraction index. The chip is mounted in a 3D printed casing that allows for in-situ optical monitoring of lens formation by pressurizing one of the two chambers.Compared to other membrane based optofluidic elements the extreme small thickness of the lipid bilayer is optically virtually non-existent. It allows for the formation of tunable optofluidic lenses with a sharp liquid separator preventing diffusion of the optical liquids.