Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Photonik II

Q 62.7: Talk

Friday, March 6, 2009, 15:30–15:45, Audi-A

Photonics 3D Gratings in Photopolymers — •Florian Büchau, Christian Müller, Alexander Schlösser, and Susanna Orlic — Optical Technologies Lab, Technische Universität Berlin

A new approach for advanced optical sensing elements based on light diffraction of 3D refractive index gratings is presented. Periodic crystal-like structures are generated by multiple beam interference combined with holographic recording. At least four collimated laser beams are overlapped in a photosensitive polymer layer to generate a periodic 3D structure. Sequential angle-multiplexed recording of 1D gratings allows for realizing any particular grating geometry. Different 3D photonic gratings are characterized with respect to their spatial and spectral diffraction properties. The analysis and characterization provide a feedback for optimizing the exposure process and parameters. Optical properties and transformations are investigated using a white light source and RGB lasers. An optical imaging setup has been constructed to display the optical functionalities of light induced 3D gratings.