AI Article Synopsis
- The study demonstrates how a low-power continuous-wave laser can trap and manipulate vapor bubbles in liquids using the Marangoni effect, which involves temperature-induced surface tension changes.
- Bubbles of varying sizes are created using light-absorbing silver nanoparticles placed on an optical fiber, allowing for control over thermal effects that influence bubble behavior.
- Numerical simulations provide models for temperature profiles and Marangoni forces, while experiments with three optical fibers show the ability to transfer bubbles between fibers by sequentially activating their lasers.
Article Abstract
In this Letter, we show 3D steady-state trapping and manipulation of vapor bubbles in liquids employing a low-power continuous-wave laser using the Marangoni effect. Light absorption from photodeposited silver nanoparticles on the distal end of a multi-mode optical fiber is used to produce bubbles of different diameters. The thermal effects produced by either the nanoparticles on the fiber tip or the light bulk absorption modulate the surface tension of the bubble wall and creates both longitudinal and transversal forces just like optical forces, effectively creating a 3D potential well. Using numerical simulations, we obtain expressions for the temperature profiles and present analytical expressions for the Marangoni force. In addition, using an array of three fibers with photodeposited nanoparticles is used to demonstrate the transfer of bubbles from one fiber to another by sequentially switching on and off the lasers.
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| http://dx.doi.org/10.1364/OL.440290 | DOI Listing |
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