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Chinese Physics, 2000, Vol. 9(11): 855-860    DOI: 10.1088/1009-1963/9/11/012
CROSS DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev  

CONSTRUCTION OF AN OPTICAL TWEEZERS—CALCULATION AND EXPERIMENTS

Sun Wei (孙巍)a, Wang Yi-qiu (王义遒)a, Gao Chong-ming (高崇明)b
a Department of Electronics, Peking University, Beijing 100871, China; b College of Life Science, Peking University, Beijing 100871, China
Abstract  We report the construction of an optical tweezers system and the results of the trapping and the moving of living algal cells. Experimental study on trapping polystyrene spheres demonstrates the effects of the system parameters on the trap. The trapping forces on dielectric spheres are calculated using Ashkin's ray-optics model. The result shows that an objective with higher numerical aperture can build a more stable trap along axial direction than an objective with lower numerical aperture, though their transverse trapping forces are on the same order.
Keywords:  optical tweezers      light force      cell biology  
Received:  03 April 2000      Revised:  07 June 2000      Accepted manuscript online: 
PACS:  87.17.-d (Cell processes)  
  87.64.M- (Optical microscopy)  
  87.80.Cc (Optical trapping)  

Cite this article: 

Sun Wei (孙巍), Wang Yi-qiu (王义遒), Gao Chong-ming (高崇明) CONSTRUCTION OF AN OPTICAL TWEEZERS—CALCULATION AND EXPERIMENTS 2000 Chinese Physics 9 855

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