Dual-mode reconfigurable focusing using the interface of aqueous and dielectric liquids
SCIE
SCOPUS
- Title
- Dual-mode reconfigurable focusing using the interface of aqueous and dielectric liquids
- Authors
- KIM, WON KYOUNG; LEE, CHANGHO; KIM, CHULHONG; KIM, DONG SUNG
- Date Issued
- 2017-11
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- An optofluidic lens serves as a highly reconfigurable device to manipulate light by using a smoothly curved interface between immiscible liquids. Here we propose a dielectro-optofluidic lens (DOL) that is capable of dual-mode reconfigurable focusing. In this DOL, light focuses through a dielectric liquid-aqueous liquid interface where movement and deformation of the interface are achieved by electrohydrodynamic (EHD) actuation. We initially perform alternating current-EHD actuation of the dielectric liquid to obtain its benefit of frequency-dependent behavior and to prevent electrolysis of the aqueous liquid. Our DOL uniquely operates in two modes, namely, an oscillation mode in the low-frequency regime (< 1 Hz) with a 10 mm focus-tuning range and a static mode in the high-frequency regime (> 10 Hz) with a 1 mm focus-tuning range, which are easily modulated on demand by the frequency range of the applied voltage. We successfully conduct proof-of-concept experiments, including extending the depth-of-field using the oscillation mode to clearly visualize thick targets, and integrating the proposed DOL with a photoacoustic microscope using the static mode to adjust the focal point.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/38953
- DOI
- 10.1039/C7LC00759K
- ISSN
- 1473-0197
- Article Type
- Article
- Citation
- LAB ON A CHIP, vol. 17, page. 4031 - 4039, 2017-11
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- There are no files associated with this item.
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