Results 51 to 60 of about 187,701 (187)
MSUD-YOLO: A Novel Multiscale Small Object Detection Model for UAV Aerial Images
DronesDue to the objects in UAV aerial images often presenting characteristics of multiple scales, small objects, complex backgrounds, etc., the performance of object detection using current models is not satisfactory.
Xiaofeng Zhao +6 more
doaj +1 more source
Optical tweezers escape forces [PDF]
SPIE Proceedings, 2014 With suitable calibration, optical tweezers can be used to measure forces. If the maximum force that can be exerted is of interest, calibration can be performed using viscous drag to remove a particle from the trap, typically by moving the stage. The stage velocity required to remove the particle then gives the escape force.
Bui, Ann AM +5 more
openaire +3 more sources
Optical forces in coupled chiral particles [PDF]
Physical Review A, 2020 11 pages, 13 ...
Kah Jen Wo +5 more
openaire +5 more sources
Circular dichroism in magneto-optical forces
Optics Express, 2022 In this article we use an exact method to resolve the fields scattered by a spherical magneto-optical particle and calculate the optical forces exerted on it. The resulting force and the contributing components, i.e. magneto-optical gradient force and magneto-optical extinction force, are presented in an analytical form.
Edelstein, Shulamit +3 more
openaire +4 more sources
Optical forces near a nanoantenna [PDF]
Journal of Nanophotonics, 2010 The Maxwell stress tensor method is used to calculate the optical forces acting upon a glass nanosphere in the proximity of optically excited gold nanoantenna structures. The dependence of optical forces over a full range of excitation angles is explored: the total internal reflection excitation does not bring any particular advantage to trapping ...
Ploschner, Martin +3 more
openaire +4 more sources
Optical forces on patterned particles [PDF]
Complex Light and Optical Forces XIII, 2019 The non-conservative nature of optical forces has been explored previously, with the initial focus on spherical particles, and latterly on particles with less than spherical symmetry. Non-conservative optical forces occur in many different guises, and include lateral forces arising from shape asymmetry, polarisation dependant optical torques and spin ...
O'Donnell, Michael, Hanna, Simon
openaire +3 more sources
Numerical and Experimental Investigation on the Optical Manipulation from an Axicon Lensed Fiber
Micromachines, 2021 Here we numerically and experimentally studied the optical trapping on a microsphere from an axicon lensed fiber (ALF). The optical force from the fiber with different tapered lengths and by incident light at different wavelengths is calculated ...
Wu Zhang +9 more
doaj +1 more source
Dominant chiral optical forces in the vicinity of optical nanofibers
Optics Letters, 2016 Transverse spin angular momentum (SAM) of light and associated transverse chiral optical forces have received tremendous attention recently as the latter may lead to an optical separation of chiral biomolecules. In this context, the relative magnitude of chiral and non-chiral forces represents a challenge for the implementation of chiral separation ...
B M Reinhard, M. H. Alizadeh
openaire +5 more sources
Resonant optical gradient force interaction for nano-imaging and -spectroscopy
New Journal of Physics, 2016 The optical gradient force provides optomechanical interactions, for particle trapping and manipulation, as well as for near-field optical imaging in scanning probe microscopy.
Honghua U Yang, Markus B Raschke
doaj +1 more source
Integrated Hybrid Tweezer for Particle Trapping with Combined Optical and Acoustic Forces
Applied Sciences, 2023 We propose an on-chip integrated hybrid tweezer that can simultaneously apply optical and acoustic forces on particles to control their motions. Multiple potential wells can be formed to trap particles, and the acoustic force generated by an interdigital
Sen Li, Xin Tong, Lutong Cai, Lin Zhang
doaj +1 more source