Abstract
We propose an optical attenuator concept based on a polymer waveguide coupled to an elastomer thin film. The thickness of the elastomer layer can be controlled by Coulomb force-induced squeezing in a capacitor geometry. Thereby resonant coupling between the light modes in the waveguide and the elastomer layer is achieved. We predict close to 100% modulation contrast and about 40% transmission for an about 200 μm long device. In addition, we demonstrate experimentally a proof-of-principle of the attenuator device.
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Galler, N., Ditlbacher, H., Hohenau, A. et al. Integrated optical attenuator based on mechanical deformation of an elastomer layer. Appl. Phys. B 104, 931–934 (2011). https://doi.org/10.1007/s00340-011-4664-3
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DOI: https://doi.org/10.1007/s00340-011-4664-3