Open Access
1 July 1997 Optical tweezers based on near infrared diode laser
S. Grego, Ennio Arimondo, Carlo Frediani
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Abstract
Emission from a single-mode 100 mW diode laser at 840 nm is used to create optical tweezers: the trappinglaser beam is introduced into a microscope and focused by the objective. The microscope also allows monitoring of the motion of the trapped particles. The optical tweezers were monitored with objectives having different numerical apertures between 0.65 and 1.3. The optical trapping of polystyrene spheres with a radius between 0.11 and 7.45 μm and of biological objects, the flagellated alga Tetraselmis, with typical dimensions of 8×8×13 μm3 were studied. The efficiency of the optical tweezers has been characterized through a parameter Q and compared with theoretical models.
S. Grego, Ennio Arimondo, and Carlo Frediani "Optical tweezers based on near infrared diode laser," Journal of Biomedical Optics 2(3), (1 July 1997). https://doi.org/10.1117/12.275449
Published: 1 July 1997
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CITATIONS
Cited by 6 scholarly publications.
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KEYWORDS
Particles

Optical tweezers

Microscopes

Objectives

Semiconductor lasers

Latex

Optical spheres

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