Results 31 to 40 of about 190,833 (286)
On-fringe optical trapping of dielectric microparticles in air [PDF]
EPJ Web of ConferencesOptical trapping in air of dielectric micro-spheres is reported using a dual fiber optical tweezers. The spheres are trapped on the interference fringes created by the two counter-propagating optical trapping beams.
Magguilli Clémence, Fick Jochen
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Enhancing gradient force over scattering force for nano-trapping through compensating for aberration
New Journal of Physics, 2023 One challenge of optical trapping of nanoparticles is the weak trapping force compared to the destabilizing pushing force. Here we enhance the optical gradient force (GF), which is responsible for trapping, to achieve stable nanoparticle trapping through
Dongyong Wang, Xiao Li, Jack Ng
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Trapping radioactive ^{82}Rb in an optical dipole trap and evidence of spontaneous spin polarization [PDF]
, 2007 Optical trapping of selected species of radioactive atoms has great potential in precision measurements for testing fundamental physics such as EDM, PNC and parity violating beta-decay asymmetry correlation coefficients.
D. Feldbaum +5 more
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Rydberg-Dressed Magneto-optical Trap [PDF]
Physical Review Letters, 2018 We propose and demonstrate the laser cooling and trapping of Rydberg-dressed Sr atoms. By off-resonantly coupling the excited state of a narrow (7 kHz) cooling transition to a high-lying Rydberg state, we transfer Rydberg properties such as enhanced electric polarizability to a stable magneto-optical trap operating at $< 1 K$.
Bounds, A. D. +6 more
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Optical Trapping at Gigapascal Pressures [PDF]
Physical Review Letters, 2013 Diamond anvil cells allow the behavior of materials to be studied at pressures up to hundreds of gigapascals in a small and convenient instrument. However, physical access to the sample is impossible once it is pressurized. We show that optical tweezers can be used to hold and manipulate particles in such a cell, confining micron-sized transparent ...
Bowman, R.W. +4 more
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Averaging out magnetic forces with fast rf-sweeps in an optical trap for metastable chromium atoms [PDF]
, 2007 We introduce a novel type of time-averaged trap, in which the internal state of the atoms is rapidly modulated to modify magnetic trapping potentials. In our experiment, fast radiofrequency (rf) linear sweeps flip the spin of atoms at a fast rate, which ...
A. Pouderous +10 more
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Blue-Detuned Magneto-Optical Trap [PDF]
Physical Review Letters, 2018 We present the properties and advantages of a new magneto-optical trap (MOT) where blue-detuned light drives `type-II' transitions that have dark ground states. Using $^{87}$Rb, we reach a radiation-pressure-limited density exceeding $10^{11}$cm$^{-3}$ and a temperature below 30$ $K.
Jarvis, KN +4 more
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Effects of Infrared Optical Trapping on Saccharomyces cerevisiae in a Microfluidic System
Sensors, 2017 Baker’s yeast (Saccharomyces cerevisiae) represents a very popular single-celled eukaryotic model organism which has been studied extensively by various methods and whose genome has been completely sequenced.
Zdeněk Pilát +3 more
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Photonics, 2022 The optothermal manipulation of micro-objects is significant for understanding and exploring the unknown in the microscale word, which has found many applications in colloidal science and life science.
Hao-Dong Wang +5 more
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Theory of an optical dipole trap for cold atoms [PDF]
, 2000 The theory of an atom dipole trap composed of a focused, far red-detuned, trapping laser beam, and a pair of red-detuned, counterpropagating, cooling beams is developed for the simplest realistic multilevel dipole interaction scheme based on a model of a
A. Ashkin +24 more
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