Origami silicon optoelectronics for hemispherical electronic eye systems

Kan Zhang, Yei Hwan Jung, Solomon Mikael, Jung-Hun Seo, Munho Kim, Hongyi Mi, Han Zhou, Zhenyang Xia, Weidong Zhou, Shaoqin Gong and Zhenqiang Ma ()
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Kan Zhang: University of Wisconsin–Madison
Yei Hwan Jung: University of Wisconsin–Madison
Solomon Mikael: University of Wisconsin–Madison
Jung-Hun Seo: University of Wisconsin–Madison
Munho Kim: University of Wisconsin–Madison
Hongyi Mi: University of Wisconsin–Madison
Han Zhou: University of Wisconsin–Madison
Zhenyang Xia: University of Wisconsin–Madison
Weidong Zhou: University of Texas at Arlington
Shaoqin Gong: University of Wisconsin–Madison
Zhenqiang Ma: University of Wisconsin–Madison

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract Digital image sensors in hemispherical geometries offer unique imaging advantages over their planar counterparts, such as wide field of view and low aberrations. Deforming miniature semiconductor-based sensors with high-spatial resolution into such format is challenging. Here we report a simple origami approach for fabricating single-crystalline silicon-based focal plane arrays and artificial compound eyes that have hemisphere-like structures. Convex isogonal polyhedral concepts allow certain combinations of polygons to fold into spherical formats. Using each polygon block as a sensor pixel, the silicon-based devices are shaped into maps of truncated icosahedron and fabricated on flexible sheets and further folded either into a concave or convex hemisphere. These two electronic eye prototypes represent simple and low-cost methods as well as flexible optimization parameters in terms of pixel density and design. Results demonstrated in this work combined with miniature size and simplicity of the design establish practical technology for integration with conventional electronic devices.

Date: 2017
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DOI: 10.1038/s41467-017-01926-1

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