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Fabrication of optical gratings by shrinkage of a rubber material |
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| Authors: | Teng-Kai Shih Jeng-Rong Ho Chia-Fu Chen Chueh-Yang Liu |
| Affiliation: | a Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan, ROC b Graduate Institute of Opto-mechatronic Engineering, National Chung Cheng University, Chia-Yi, 621, Taiwan, ROC c Institute of Material and system Engineering, MingDao University, ChangHua, 523, Taiwan, ROC |
| Abstract: | Ordered wavy surface structures generated by deposition of a metal thin film on a pre-stretched PDMS plate were fabricated and its potential application for optical gratings was proposed. The orientation of the generated structures was always perpendicular to the pre-stretched direction and the pitch of the structure could be adjusted ranging from 4.5 μm to 6.8 μm by controlling the strength of the pre-stretched strain and the thickness of the surface metal film. Based on these periodic structures, various optical gratings were demonstrated. With a slight modification of the fabrication scheme, gratings with different orientations can be fabricated on both sides of the PDMS plate, the double-sided gratings, could be fabricated. It is believed the current method has the potential for the fabrication of a large-scale diffractive grating at lower costs. |
| Keywords: | PDMS Metal films Wavy structures Gratings |
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