Results 51 to 60 of about 855,719 (327)

Multi-electron beam generation using co-propagating, parallel laser beams

New Journal of Physics, 2018
High intensity short pulse laser plasma interaction experiments were performed to investigate laser wakefield acceleration (LWFA) in the ‘bubble’ regime. Using a specially designed phase plate, two high intensity laser focal spots were generated adjacent
J Elle, T Z Zhao, Y Ma, K Behm, A Lucero, A Maksimchuk, J A Nees, A G R Thomas, A Schmitt-Sody, K Krushelnick   +9 more
doaj   +1 more source

Curvilinear optical forces [PDF]

Physical Review A, 2015
Accelerating a light beam makes a particle move along a curvilinear trajectory. We show that the curvature of the trajectory causes a special kind of nonconservative force, which is called a curvilinear force. We obtain the expression for this force acting on a spherical particle in the Rayleigh approximation and determine its value for several types ...
openaire   +3 more sources

Variable - temperature scanning optical and force microscope [PDF]

, 2004
The implementation of a scanning microscope capable of working in confocal, atomic force and apertureless near field configurations is presented. The microscope is designed to operate in the temperature range 4 - 300 K, using conventional helium flow ...
Betzig E., H. Zhu, J. Jevy, N. G. Patil, P. S. Fodor   +4 more
core   +3 more sources

RGB to Infrared Image Translation Based on Diffusion Bridges Under Aerial Perspective

Remote Sensing
Infrared images have garnered significant interest due to their superior performance, driving extensive research on visible-to-infrared image translation. However, existing cross-domain generation methods lack specialization for infrared image generation
Xin Wang, Wei Cai, Yao Ding, Xingyu Di, Shuhui Li, Zhongjie Yin, Haoran Jia, Junfeng Fu   +7 more
doaj   +1 more source

Optical Fiber Tweezers: A Versatile Tool for Optical Trapping and Manipulation

Micromachines, 2020
Optical trapping is widely used in different areas, ranging from biomedical applications, to physics and material sciences. In recent years, optical fiber tweezers have attracted significant attention in the field of optical trapping due to their ...
Xiaoting Zhao, Nan Zhao, Yang Shi, Hongbao Xin, Baojun Li   +4 more
doaj   +1 more source

Plasmonic Nanostructures for Optically Induced Movement

Frontiers in Nanotechnology, 2022
Optical forces generated at the nanoscale using electric field gradients have proven to be a powerful tool for trapping and moving nano-objects in a variety of application fields ranging from aerospace engineering to biology and medicine.
Sergio Balestrieri, Sergio Balestrieri, Gianluigi Zito, Giuseppe Coppola, Mario Iodice   +4 more
doaj   +1 more source

Optical Forces Arising from Phase Gradients [PDF]

Physical Review Letters, 2008
We demonstrate both theoretically and experimentally that gradients in the phase of a light field exert forces on illuminated objects, including forces transverse to the direction of propagation. This effect generalizes the notion of the photon orbital angular momentum carried by helical beams of light.
Roichman, Yohai, Sun, Bo, Roichman, Yael, Amato-Grill, Jesse, Grier, David G.   +4 more
openaire   +3 more sources

MSUD-YOLO: A Novel Multiscale Small Object Detection Model for UAV Aerial Images

Drones
Due 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, Hui Zhang, Wenwen Zhang, Junyi Ma, Chenxiao Li, Yao Ding, Zhili Zhang   +6 more
doaj   +1 more source

DVIF-Net: A Small-Target Detection Network for UAV Aerial Images Based on Visible and Infrared Fusion

Remote Sensing
During UAV aerial photography tasks, influenced by flight altitude and imaging mechanisms, the target in images often exhibits characteristics such as small size, complex backgrounds, and small inter-class differences.
Xiaofeng Zhao, Hui Zhang, Chenxiao Li, Kehao Wang, Zhili Zhang   +4 more
doaj   +1 more source

Optical forces in nanowire pairs and metamaterials

, 2010
We study the optical force arising when isolated gold nanowire pairs and metamaterials with a gold nanowire pair in the unit cell are illuminated with laser radiation.
Chu, Chu, Cohen-Tannoudji, Costas M. Soukoulis, Dolling, Garcia-Garcia, Gay-Balmaz, Hallock, Halterman, Johnson, Katsarakis, Kippenberg, Koschny, Li, Liu, N’Gom, Papasimakis, Park, Penciu, Pendry, Philippe Tassin, Phillips, Povinelli, Rockstuhl, Rongkuo Zhao, Shalaev, Shelby, Smith, Tassin, Tassin, Thomas Koschny, Van Thourhout, Veselago, Wiederhecker, Zhang, Zhou   +35 more
core   +1 more source