Experimental Measurement and Analysis of Scattering Force and Gradient Force in Optical Trapping and Manipulation of Micro-particles

2003 ◽  
pp. 467-475 ◽  
Author(s):  
Arthur Chiou
Keyword(s):  
Experimental Measurement ◽  
Optical Trapping ◽  
Gradient Force ◽  
Micro Particles ◽  
Measurement And Analysis ◽  
Scattering Force

scholarly journals Spheroidal trap shell beyond diffraction limit induced by nonlinear effects in femtosecond laser trapping

Nanophotonics ◽  
2020 ◽  
Vol 9 (14) ◽  
pp. 4315-4325 ◽  
Author(s):  
Lu Huang ◽  
Yaqiang Qin ◽  
Yunfeng Jin ◽  
Hao Shi ◽  
Honglian Guo ◽  
...  
Keyword(s):  
Optical Trapping ◽  
Materials Science ◽  
Numerical Aperture ◽  
Nonlinear Effects ◽  
Diffraction Limit ◽  
Optical Systems ◽  
Objective Lens ◽  
Gradient Force ◽  
Scattering Force ◽  
On Chip

AbstractBeyond diffraction limit, multitrapping of nanoparticles is important in numerous scientific fields, including biophysics, materials science and quantum optics. Here, we demonstrate the 3-dimensional (3D) shell-like structure of optical trapping well induced by nonlinear optical effects in the femtosecond Gaussian beam trapping for the first time. Under the joint action of gradient force, scattering force and nonlinear trapping force, the gold nanoparticles can be stably trapped in some special positions, or hop between the trap positions along a route within the 3D shell. The separation between the trap positions can be adjusted by laser power and numerical aperture (NA) of the trapping objective lens. With a high NA lens, we achieved dual traps with less than 100 nm separation without utilizing complicated optical systems or any on-chip nanostructures. These curious findings will greatly extend and deepen our understanding of optical trapping based on nonlinear interaction and generate novel applications in various fields, such as microfabrication/nanofabrication, sensing and novel micromanipulations.

scholarly journals Direct 2D measurement of time-averaged forces and pressure amplitudes in acoustophoretic devices using optical trapping

Lab on a Chip ◽  
2015 ◽  
Vol 15 (1) ◽  
pp. 290-300 ◽  
Author(s):  
Stefan Lakämper ◽  
Andreas Lamprecht ◽  
Iwan A. T. Schaap ◽  
Jurg Dual
Keyword(s):  
Optical Trapping ◽  
Flow Cell ◽  
Acoustic Flow ◽  
Micro Particles ◽  
Laser Trap ◽  
Optical Laser

Forces on single spherical micro particles in an acoustic flow cell were directly measured with an optical laser trap.

Optical Trapping of Nano-(Micro)Particles by Gradient and Photorefractive Forces

2009 ◽  
Vol 5 (3) ◽  
pp. 268-274 ◽  
Author(s):  
N. Kukhtarev ◽  
T. Kukhtareva ◽  
F. Okafor
Keyword(s):  
Optical Trapping ◽  
Micro Particles

Measurement of the optical trapping force on micro-particles immersed in fluids

2005 ◽  
Author(s):  
Monica Nadasan ◽  
Revati Kulkarni ◽  
Enrico Ferrari ◽  
Valeria Garbin ◽  
Dan Cojoc ◽  
...  
Keyword(s):  
Optical Trapping ◽  
Micro Particles ◽  
Trapping Force
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