Loading dynamics of optical trap and parametric excitation resonances of trapped atoms

2006 ◽  
Vol 100 (5) ◽  
pp. 054903 ◽  
Author(s):  
Jinwei Wu ◽  
Raymond Newell ◽  
Marc Hausmann ◽  
David J. Vieira ◽  
Xinxin Zhao
Keyword(s):  
Parametric Excitation ◽  
Optical Trap ◽  
Trapped Atoms

scholarly journals Dependence of number of trapped atoms on the experimental parameters of Rb magneto-optical trap

2006 ◽  
Vol 55 (1) ◽  
pp. 125
Author(s):  
Jiang Kai-Jun ◽  
Li Ke ◽  
Wang Jin ◽  
Zhan Ming-Sheng
Keyword(s):  
Optical Trap ◽  
Magneto Optical Trap ◽  
Trapped Atoms ◽  
Experimental Parameters

Transfer of ultracold 87Rb from a QUIC magnetic trap into a far off resonance optical trap

2007 ◽  
Vol 85 (3) ◽  
pp. 247-258 ◽  
Author(s):  
H Ming ◽  
W A van Wijngaarden
Keyword(s):  
Laser Beam ◽  
Magnetic Trap ◽  
Temporal Evolution ◽  
Optical Trap ◽  
Probe Laser ◽  
Ultracold Atom ◽  
Trapped Atoms ◽  
Atom Cloud ◽  
Optically Trapped

Ultracold 87Rb atoms were transferred from a QUIC (quadrupole and Ioffe configuration) magnetic trap into a far off resonance optical trap (FORT). FORTs were created by focusing a 150 mW laser beam having a wavelength of 852 nm to a spot having a radius of 20 and 30 µm. A probe laser then passed through the ultracold atom cloud after the magnetic trap was turned off to study the temporal evolution of the optically trapped atoms. Nearly 106 atoms could be transferred into the FORT at temperatures as low as 1 µK with an efficiency as high as 50%. PACS No.: 32.80.Pj

scholarly journals Cooling atoms in an optical trap by selective parametric excitation

2002 ◽  
Vol 65 (2) ◽  
Author(s):  
N. Poli ◽  
R. J. Brecha ◽  
G. Roati ◽  
G. Modugno
Keyword(s):  
Parametric Excitation ◽  
Optical Trap

scholarly journals Biomechanics of Neutrophil Tethers

Life ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 515
Author(s):  
Andrea Cugno ◽  
Alex Marki ◽  
Klaus Ley
Keyword(s):  
Cell Activation ◽  
Optical Trap ◽  
Biomechanical Properties ◽  
Force Microscopy ◽  
Advantages And Disadvantages ◽  
Atomic Force ◽  
Microfluidic Flow ◽  
Biomembrane Force Probe ◽  
Membrane Reservoir

Leukocytes, including neutrophils, which are propelled by blood flow, can roll on inflamed endothelium using transient bonds between selectins and their ligands, and integrins and their ligands. When such receptor–ligand bonds last long enough, the leukocyte microvilli become extended and eventually form thin, 20 m long tethers. Tether formation can be observed in blood vessels in vivo and in microfluidic flow chambers. Tethers can also be extracted using micropipette aspiration, biomembrane force probe, optical trap, or atomic force microscopy approaches. Here, we review the biomechanical properties of leukocyte tethers as gleaned from such measurements and discuss the advantages and disadvantages of each approach. We also review and discuss viscoelastic models that describe the dependence of tether formation on time, force, rate of loading, and cell activation. We close by emphasizing the need to combine experimental observations with quantitative models and computer simulations to understand how tether formation is affected by membrane tension, membrane reservoir, and interactions of the membrane with the cytoskeleton.

scholarly journals Compact ultracold electron source based on a grating magneto-optical trap

2019 ◽  
Vol 22 (2) ◽  
Author(s):  
J. G. H. Franssen ◽  
T. C. H. de Raadt ◽  
M. A. W. van Ninhuijs ◽  
O. J. Luiten
Keyword(s):  
Optical Trap ◽  
Electron Source ◽  
Magneto Optical Trap

scholarly journals Narrow-line magneto-optical trap for europium

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
Yuki Miyazawa ◽  
Ryotaro Inoue ◽  
Hiroki Matsui ◽  
Kenta Takanashi ◽  
Mikio Kozuma
Keyword(s):  
Optical Trap ◽  
Magneto Optical Trap ◽  
Narrow Line
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