Results 41 to 50 of about 190,833 (286)

Ramsey Imaging of Optical Traps [PDF]

Physical Review Applied, 2021
Mapping the potential landscape with high spatial resolution is crucial for quantum technologies based on ultracold atoms. Yet, imaging optical dipole traps is challenging because purely optical methods, commonly used to profile laser beams in free space, are not applicable in vacuum.
Gautam Ramola, Richard Winkelmann, Karthik Chandrashekara, Wolfgang Alt, Peng Xu, Dieter Meschede, Andrea Alberti   +6 more
openaire   +2 more sources

Design of a Single Nanoparticle Trapping Device Based on Bow-Tie-Shaped Photonic Crystal Nanobeam Cavities

IEEE Photonics Journal, 2019
Photonic crystal (PhC) cavities have been widely utilized for the optical trapping. However, it is still challenging to achieve high-efficiency optical trapping of ultrasmall nanoparticles.
Yan Gao, Yaocheng Shi
doaj   +1 more source

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

Nanophotonics, 2020
Beyond diffraction limit, multitrapping of nanoparticles is important in numerous scientific fields, including biophysics, materials science and quantum optics.
Huang Lu, Qin Yaqiang, Jin Yunfeng, Shi Hao, Guo Honglian, Xiao Liantuan, Jiang Yuqiang   +6 more
doaj   +1 more source

Unified treatment of nonlinear optical force in laser trapping of dielectric particles of varying sizes

Physical Review Research, 2021
Optical trapping using laser tweezer has revolutionized the field of force spectroscopy having enormous applications in biological manipulation. While a number of theories were developed for particles of different sizes to estimate trapping force under ...
Anita Devi, Arijit K. De
doaj   +1 more source

Low-cost optical manipulation using hanging droplets of PDMS [PDF]

, 2015
We propose and demonstrate a low-cost optical micromanipulation system that makes use of simple microfrabricated components coupled to a smartphone camera for imaging. Layering hanging droplets of polydimethylsiloxane (PDMS) on microscope coverslips, and
Ashkin, Baden, Bellina, Breslauer, Budde, Burnham, Chowdhury, Erickson, Fei, Gambin, Hofmann, Jeong, Lee, Mao, Pralle, Ren, Skandarajah, Smith, Svoboda, Tadmor, Wilbur   +20 more
core   +3 more sources

Trapping of resonant metallic nanoparticles with engineered vectorial optical field

Nanophotonics, 2014
Optical trapping and manipulation using focused laser beams has emerged as a powerful tool in the biological and physical sciences. However, scaling this technique to metallic nanoparticles remains challenging due to the strong scattering force and ...
Rui Guanghao, Zhan Qiwen
doaj   +1 more source

Coated High-Refractive-Index Barium Titanate Glass Microspheres for Optically Trapped Microsphere Super-Resolution Microscopy: A Simulation Study

Photonics, 2020
As water is normally used as the immersion medium in optically trapped microsphere microscopy, the high-refractive-index barium titanate glass (BTG) microsphere shows a better imaging performance than the low-index polystyrene (PS) or melamine ...
Xi Liu, Song Hu, Yan Tang
doaj   +1 more source

Optimized holographic optical traps

Optics Express, 2005
Holographic optical traps use the forces exerted by computer-generated holograms to trap, move and otherwise transform mesoscopically textured materials. This article introduces methods for optimizing holographic optical traps' efficiency and accuracy, and an optimal statistical approach for characterizing their performance.
Polin, Marco, Ladavac, Kosta, Lee, Sang-Hyuk, Roichman, Yael, Grier, David G.   +4 more
openaire   +3 more sources

Numerical Analysis of Optical Trapping Force Affected by Lens Misalignments

Photonics, 2021
Geometrical optics approximation is a classic method for calculating the optical trapping force on particles whose sizes are larger than the wavelength of the trapping light.
Hanlin Zhang, Wenqiang Li, Nan Li, Huizhu Hu   +3 more
doaj   +1 more source

Self-trapping of Bose-Einstein condensates in optical lattices

, 2006
The self-trapping phenomenon of Bose-Einstein condensates (BECs) in optical lattices is studied extensively by numerically solving the Gross-Pitaevskii equation.
Fu, Panming, Liu, Jie, Wang, Bingbing, Wu, Biao   +3 more
core   +1 more source