Optical switch based on variable aperture |
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Authors: | Ren Hongwen Xu Su Wu Shin-Tson |
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Institution: | Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Chonbuk, South Korea. hongwen@jbnu.ac.kr |
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Abstract: | We report on a pixel whose aperture can be varied electrically. The pixel is confined by a hole-patterned polymer wall and a dielectric liquid forms a ring shape around the wall surface. Without an electric field, the pixel has the largest aperture. The applied fringing field stretches the liquid surface, leading to a decrease in the aperture size. The switchable aperture ratio of the pixel is over 80% and the response time is ~10 ms. Such a device is useful for an optical attenuator, a light shutter, an adaptive iris, and an information display. |
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