A novel single fiber optical tweezers based on light-induced thermal effect

Yu Zhang; Zhihai Liu; Peibo Liang; Yaxun Zhang; Enming Zhao; Jun Yang; Libo Yuan

doi:10.1117/12.2183601

1 July 2015 A novel single fiber optical tweezers based on light-induced thermal effect

Yu Zhang, Zhihai Liu, Peibo Liang, Yaxun Zhang, Enming Zhao, Jun Yang, Libo Yuan

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96551C (2015) https://doi.org/10.1117/12.2183601
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

We present and demonstrate a novel single fiber optical tweezers which can trap and launch (clean) a target polystyrene (PS) microsphere (diameter~10μm) with independent control by using two wavelengths beams: 980nm and 1480nm. We employ 980nm laser beam to trap the target PS microsphere by molding the fiber tip into a special tapered-shape; and we employ 1480nm laser beam to launch the trapped PS microsphere with a certain velocity by using the thermophoresis force generated from the thermal effect due to the high absorption of the 1480nm laser beams in water. When the launching force is smaller than the trapping force, the PS microsphere will be trapped near the fiber tip, and the launching force will blow away other PS microspheres in the workspace realizing the cleaning function; When the launching force is larger than the trapping force, the trapped PS microsphere will be launched away from the fiber tip with a certain velocity and towards a certain direction, realizing the launching function. This PS microsphere launching and cleaning functions expanded new features of single fiber optical tweezers, providing for the possibility of more practical applications in the micro manipulation research fields.

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Yu Zhang, Zhihai Liu, Peibo Liang, Yaxun Zhang, Enming Zhao, Jun Yang, and Libo Yuan "A novel single fiber optical tweezers based on light-induced thermal effect", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96551C (1 July 2015); https://doi.org/10.1117/12.2183601

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KEYWORDS

Optical tweezers

Fiber optics

Picosecond phenomena

Light sources

Thermal effects

Particles

Absorption

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