Journal
APPLIED PHYSICS EXPRESS
Volume 14, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.35848/1882-0786/abdcda
Keywords
optical tweezers; optical trapping; optical nanomanipulation; holography; nanoparticles
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Funding
- Scientific Research Foundation of Hunan Provincial Education Department [20A315]
- Foundation of China Scholarship Council
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The researchers proposed an optical tweezer with tunable potential wells by manipulating the phase gradient of light, allowing for versatile optical nanomanipulation. The tunable optical tweezer offers benefits such as flexible design, easy control, and high tunability, providing a new tool for exploring novel functions in optical nanomanipulation.
We propose an optical tweezer with tunable potential wells, by dynamically manipulating the phase gradient of light. Using our proposed method to design holograms, we can obtain desirable phase profiles and intensity distributions of optical traps. Optical force arising from phase gradient creates tunable potential wells for versatile optical nanomanipulation, such as trapping nanoparticles in peanut-shaped optical spots, positioning and shifting nanoparticles in optical gears, and controllable transport, as demonstrated in our experiments. The tunable optical tweezer has several merits including flexible design, easy control and high tunability, which provides a new tool for exploring novel functions in optical nanomanipulation.
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