Optical trapping forces by a focused beam through two media with different refractive indices

2003 ◽  
Vol 226 (1-6) ◽  
pp. 25-31 ◽  
Author(s):  
Kang-Bin Im ◽  
Hyun-Ik Kim ◽  
In-Je Joo ◽  
Cha-Hwan Oh ◽  
Seok-Ho Song ◽  
...  
Keyword(s):  
Optical Trapping ◽  
Refractive Indices ◽  
Trapping Forces ◽  
Focused Beam

Calculation of optical trapping forces on dielectric spheres at an oil-water interface with ray-optics model

2010 ◽  
Vol 8 (7) ◽  
pp. 673-675
Author(s):  
钟敏成 Mincheng Zhong ◽  
周金华 Jinhua Zhou ◽  
李银妹 Yinmei Li
Keyword(s):  
Optical Trapping ◽  
Water Interface ◽  
Ray Optics ◽  
Dielectric Spheres ◽  
Oil Water ◽  
Trapping Forces

Optical trapping forces on biological cells on a waveguide surface

2011 ◽  
Author(s):  
Pal Lovhaugen ◽  
Balpreet S. Ahluwalia ◽  
Thomas R. Huser ◽  
Peter McCourt ◽  
Olav Gaute Helleso
Keyword(s):  
Optical Trapping ◽  
Biological Cells ◽  
Trapping Forces ◽  
Waveguide Surface

Axial optical trapping forces on two particles trapped simultaneously by optical tweezers

2005 ◽  
Vol 44 (13) ◽  
pp. 2667 ◽  
Author(s):  
Shenghua Xu ◽  
Yinmei Li ◽  
Liren Lou
Keyword(s):  
Optical Tweezers ◽  
Optical Trapping ◽  
Trapping Forces

scholarly journals Towards non-blind optical tweezing by finding 3D refractive index changes through off-focus interferometric tracking

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Benjamin Landenberger ◽  
Yatish ◽  
Alexander Rohrbach
Keyword(s):  
Refractive Index ◽  
Laser Scanning ◽  
Optical Trapping ◽  
Optical Traps ◽  
Large Specimen ◽  
Biological Specimen ◽  
3D Microscopy ◽  
Index Changes ◽  
Computer Controlled ◽  
Trapping Forces

AbstractIn modern 3D microscopy, holding and orienting arbitrary biological objects with optical forces instead of using coverslips and gel cylinders is still a vision. Although optical trapping forces are strong enough and related photodamage is acceptable, the precise (re-) orientation of large specimen with multiple optical traps is difficult, since they grab blindly at the object and often slip off. Here, we present an approach to localize and track regions with increased refractive index using several holographic optical traps with a single camera in an off-focus position. We estimate the 3D grabbing positions around several trapping foci in parallel through analysis of the beam deformations, which are continuously measured by defocused camera images of cellular structures inside cell clusters. Although non-blind optical trapping is still a vision, this is an important step towards fully computer-controlled orientation and feature-optimized laser scanning of sub-mm sized biological specimen for future 3D light microscopy.

Increasing optical trapping forces by means of photonic nanojets

2020 ◽  
Author(s):  
Dasheng Lu ◽  
Marco Pedroni ◽  
Lucia Labrador-Paez ◽  
Manuel I. Marqués ◽  
Daniel Jaque ◽  
...  
Keyword(s):  
Optical Trapping ◽  
Photonic Nanojets ◽  
Trapping Forces

Nanowire-type plasmonic waveguides as strong and tunable optical tweezers

2019 ◽  
Vol 33 (07) ◽  
pp. 1950081 ◽  
Author(s):  
Shu Yang ◽  
Kang Zhao
Keyword(s):  
Long Range ◽  
Optical Tweezers ◽  
Optical Trapping ◽  
Near Field ◽  
Optical Forces ◽  
Plasmonic Waveguides ◽  
Trapping Forces

A series of nanowire-type plasmonic waveguides are proposed. The mode properties of these waveguides and their dependences on various geometry parameters are studied. It is shown that they can generate deep subwavelength confinement and long-range propagation simultaneously. Moreover, the optical forces exerted on dielectric nanoparticles by these waveguides are calculated. It is found that the optical trapping forces are very strong, and that their distribution can be effectively regulated by certain geometry parameters. Using these features, strong and tunable near-field optical tweezers can be designed.

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