Voltage-controlled optical filter based on electrowetting  

作　　者：王迪 刘超 王琼华 周昕 

机构地区：[1]School of Electronics and Information Engineering, Sichuan University [2]State Key Laboratory of Fundamental Science on Synthetic Vision, Sichuan University

出　　处：《Chinese Optics Letters》2014年第12期48-51,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61225022 and 61320106015);the National "973" Program of China(No.2013CB328802);the National "863" Program of China(No.2012AA011901);the Research Program of Sichuan Province,China(No.2013TD0002)

摘　　要：In this letter, we propose a voltage-controlled optical filter based on electrowetting. The device is made of a transparent cubic cell filled with two immiscible liquids having three indium tin oxide electrodes fabricated on the bottom substrate of the cell. A conductive droplet carrying a color filter is placed on the ITO electrode and the surrounding liquid is density-matched silicone oil. Under zero bias, the droplet is placed in the middle of tile substrate and white light passes through the filter and we can see red light on the screen. When a voltage is applied to the device, the filter moves with the liquid based on electrowetting effect, we can see the white light on the screen. Due to the movement of the liqnid, our device functions as an optical switcher. The switch trine of the device is -70 ms. The proposed device has a wide application in optical communication. electronic display, and optical switch.In this letter, we propose a voltage-controlled optical filter based on electrowetting. The device is made of a transparent cubic cell filled with two immiscible liquids having three indium tin oxide electrodes fabricated on the bottom substrate of the cell. A conductive droplet carrying a color filter is placed on the ITO electrode and the surrounding liquid is density-matched silicone oil. Under zero bias, the droplet is placed in the middle of tile substrate and white light passes through the filter and we can see red light on the screen. When a voltage is applied to the device, the filter moves with the liquid based on electrowetting effect, we can see the white light on the screen. Due to the movement of the liqnid, our device functions as an optical switcher. The switch trine of the device is -70 ms. The proposed device has a wide application in optical communication. electronic display, and optical switch.

关 键 词：Display devices DROPS Electric switches ELECTRODES Liquids Matched filters Optical filters SILICONES Tin oxides WETTING 

分 类 号：TN713[电子电信—电路与系统] TM714.3[电气工程—电力系统及自动化]