Ms. Sujung Kim Profile

Sujung Kim

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Proceedings Article | 23 April 2019 Presentation + Paper

Switchable diffraction device using reversible electrodeposition

Seong M. Cho, Sujung Kim, Yong-Hae Kim, Chi-Young Hwang, Tae-Youb Kim, Sang-Hoon Cheon, Joo Yeon Kim, Kyunghee Choi, Chi-Sun Hwang, Jeong-Ik Lee

Proceedings Volume 11030, 110300O (2019) https://doi.org/10.1117/12.2520829

KEYWORDS: Diffraction, Diffraction gratings, Metamaterials, Silver

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A switchable diffraction device capable of driving with segment electrodes has been proposed and its operating characteristics were analyzed. The switchable diffraction device is based on a variable cavity structure using reversible electrodeposition technology and two kinds of diffraction gratings are designed to be selectively switched according to the driving electrode. The fabricated device was able to switch the diffraction patterns without any interference between the electrodes, which means that the interference between the electrodes will not be a problem in further device integration with driving circuits. However, when the electrode isolation is not perfect due to parasitic resistance between the electrodes, a weak interference between the electrodes is observed in the diffraction pattern. Therefore, it is expected that ensuring complete insulation between the electrodes will be a very important in the integration of the device. The proposed device can be used as a light control device, an image switchable hologram, etc. Furthermore, it is expected to be applied to reconfigurable metasurfaces through integration with active matrix circuits in the future.

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