Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 34, Issue 10, Pages 537-540Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2022.3170949
Keywords
Electrowetting-on-dielectrics (EWOD); liquid lenses; flexible wire electrode; optofluidics
Funding
- National Natural Science Foundation of China [61775102]
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This article proposes a method for manufacturing an electrowetting-on-dielectrics (EWOD) liquid lens based on a flexible wire electrode, and verifies its practicality and superior performance through experiments. It also points out the potential of this fabrication process for producing other optofluidic components.
An electrowetting-on-dielectrics (EWOD) liquid lens, based on a flexible wire electrode, is proposed to avoid the defects prone to occur in the large area coating dielectric layer inside the cavity. A liquid lens cavity is formed by winding the flexible conductive wire with a thin dielectric layer (named EWOD wire) along the direction of light transmission in a circular wall uniformly. A tubular double-liquid electrowetting lens with a clear aperture of 7 mm is fabricated to demonstrate the practicality of this fabrication process. It can reach a focal length variation range of (-infinity, -30 mm] boolean OR [69 mm, +infinity) at a voltage of 0-190 V-rms and shows the other performance not inferior to those of liquid lenses fabricated by traditional methods. The EWOD wire can be assembled into any shape, performing the potential to produce other optofluidic components.
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