Results 251 to 260 of about 2,361,376 (289)
Some of the next articles are maybe not open access.
Optical vortex trapping of particles
Optics Letters, 1996We demonstrate three-dimensional trapping of low-index particles (20-microm-diameter hollow glass spheres in water) by using a single, strongly focused, stationary dark optical vortex laser beam. The holographically generated vortex, which is similar to a TEM(01)* mode beam, was also used to trap and form ring patterns of high-index particles.
Grover A. Swartzlander
exaly +3 more sources
Servo control of an optical trap
Applied Optics, 2007A versatile optical trap has been constructed to control the position of trapped objects and ultimately to apply specified forces using feedback control. While the design, development, and use of optical traps has been extensive and feedback control has played a critical role in pushing the state of the art, few comprehensive examinations of feedback ...
Kurt D, Wulff +2 more
openaire +2 more sources
Optical Traps for Dark Excitons
Physical Review Letters, 2011We propose a mechanism for optical trapping of dark excitons by linearly polarized unabsorbed standing waves, with a potential depth of the order of a few meV. Since this trapping, based on carrier exchanges with virtual excitons coupled to unabsorbed photons, equally acts on bright and dark states, Bose-Einstein condensation of excitons--which occurs ...
Combescot, Monique +2 more
openaire +2 more sources
Optical traps with geometric aberrations
Applied Optics, 2006We assess the influence of geometric aberrations on the in-plane performance of optical traps by studying the dynamics of trapped colloidal spheres in deliberately distorted holographic optical tweezers. The lateral stiffness of the traps turns out to be insensitive to moderate amounts of coma, astigmatism, and spherical aberration.
Yael, Roichman +3 more
openaire +2 more sources
Optical trapping for analytical biotechnology
Current Opinion in Biotechnology, 2012We describe the exciting advances of using optical trapping in the field of analytical biotechnology. This technique has opened up opportunities to manipulate biological particles at the single cell or even at subcellular levels which has allowed an insight into the physical and chemical mechanisms of many biological processes.
Praveen C, Ashok, Kishan, Dholakia
openaire +2 more sources
Optical Trapping and Unfolding of RNA
2011Optical tweezers have proven a useful tool for exploring the structure and function of individual molecules, such as proteins, DNA, and RNA. The ability to unfold and refold biological molecules has provided novel insights that complement and go beyond traditional biochemical and structural approaches.
Katherine H, White, Koen, Visscher
openaire +2 more sources
Optical trapping of carbon nanotubes
Physica E: Low-dimensional Systems and Nanostructures, 2008Optical trapping is a new tool for the manipulation and deposition of single wall carbon nanotube (SWNT) bundles. We present a study on optical trapping and manipulation of SWNT bundles in different environments, aimed at understanding the trapping mechanism. SWNTs are dispersed in water or organic solvents, and a wide range of both ionic and non-ionic
Maragò O M +11 more
openaire +5 more sources
Optical trapping of optical nanoparticles: Fundamentals and applications
Opto-Electronic Science, 2023Patricia Haro-González +2 more
exaly
Application of Plasmonic Bowtie Nanoantenna Arrays for Optical Trapping, Stacking, and Sorting
Nano Letters, 2012Nicholas X. Fang +2 more
exaly