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Conference Paper

Visible-Light Optical Phased Arrays with a Convex Grating Emitter on Implantable Neural Probes for Spatially Targeted Deep Brain Optogenetics

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Sharma,  Ankita       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;
Max Planck - University of Toronto Centre for Neural Science and Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Chen,  Fu-Der       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Govdeli,  Alperen
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Sacher,  Wesley D.       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Poon,  Joyce K. S.       
Nanophotonics, Integration, and Neural Technology, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Citation

Sharma, A., Chen, F.-D., Govdeli, A., Luo, X., Chua, H., Lo, G.-Q., et al. (2024). Visible-Light Optical Phased Arrays with a Convex Grating Emitter on Implantable Neural Probes for Spatially Targeted Deep Brain Optogenetics. In J. Witzens, J. Poon, L. Zimmermann, & W. Freude (Eds.), The 25th European Conference on Integrated Optics: Proceedings of the ECIO (pp. 163-167). Cham: Springer Nature Switzerland. doi:10.1007/978-3-031-63378-2_26.


Cite as: https://hdl.handle.net/21.11116/0000-000F-AF05-7
Abstract
We demonstrate single-lobe beam-steering at λ = 460–478 nm using an end-fire optical phased array coupled to a free-propagation region slab and convex grating for out-of-plane emission. Our design achieves sidelobe-free steering over 57% of the total maximum steering range 100 µm away from the OPA. The devices were implemented in silicon nitride waveguides and integrated on implantable silicon neural probes for targeted optogenetics.