Results 11 to 20 of about 343,154 (297)

Ultrafast nonlinear optical response of Dirac fermions in graphene [PDF]

open access: yes, 2018
The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting in a million-fold increase from ...
Baudisch, Matthias   +10 more
core   +2 more sources

Giant Optical Manipulation

open access: yesPhysical Review Letters, 2010
We demonstrate a new principle of optical trapping and manipulation increasing more than 1000 times the manipulation distance by harnessing strong thermal forces while suppressing their stochastic nature with optical vortex beams. Our approach expands optical manipulation of particles into a gas media and provides a full control over trapped particles,
Shvedov, Vladlen   +5 more
openaire   +3 more sources

A Step-by-step Guide to the Realisation of Advanced Optical Tweezers [PDF]

open access: yes, 2015
Since the pioneering work of Arthur Ashkin, optical tweezers have become an indispensable tool for contactless manipulation of micro- and nanoparticles.
Gigain, Sylvain   +6 more
core   +3 more sources

An Asymmetric Feature Enhancement Network for Multiple Object Tracking of Unmanned Aerial Vehicle

open access: yesRemote Sensing, 2023
Multiple object tracking (MOT) in videos captured by unmanned aerial vehicle (UAV) is a fundamental aspect of computer vision. Recently, the one-shot tracking paradigm integrates the detection and re-identification (ReID) tasks, striking a balance ...
Jianbo Ma   +5 more
doaj   +1 more source

Optically controlled grippers for manipulating micron-sized particles [PDF]

open access: yes, 2007
We report the development of a joystick controlled gripper for the real-time manipulation of micron-sized objects, driven using holographic optical tweezers (HOTs).
Ashkin A   +8 more
core   +3 more sources

Optical trapping and manipulation of nanostructures [PDF]

open access: yesNature Nanotechnology, 2013
Optical trapping and manipulation of micrometre-sized particles was first reported in 1970. Since then, it has been successfully implemented in two size ranges: the subnanometre scale, where light-matter mechanical coupling enables cooling of atoms, ions and molecules, and the micrometre scale, where the momentum transfer resulting from light ...
Maragò   +9 more
openaire   +8 more sources

Quantum state engineering on an optical transition and decoherence in a Paul trap [PDF]

open access: yes, 1999
A single Ca+ ion in a Paul trap has been cooled to the ground state of vibration with up to 99.9% probability. Starting from this Fock state |n=0> we have demonstrated coherent quantum state manipulation on an optical transition.
B. E. King   +22 more
core   +2 more sources

Bayesian Model for 3D Undulating Terrain Depth Estimation Using Photon Counting LiDAR

open access: yesRemote Sensing, 2023
Photon counting LiDAR can capture the 3D information of long-distance targets and has the advantages of high sensitivity and high resolution. However, the noise counts restrict improvements in the photon counting imaging quality.
Rui Wang   +5 more
doaj   +1 more source

A Method Based on Time-Scale Factor for Correcting the Nonlinear Frequency Sweeping in an OFDR System

open access: yesIEEE Photonics Journal, 2019
A data processing method for correcting the frequency sweeping nonlinearity of a tunable laser in an optical frequency domain reflectometry system is presented.
Jingjing Xing   +6 more
doaj   +1 more source

Plasma Figure Correction Method Based on Multiple Distributed Material Removal Functions

open access: yesMicromachines, 2023
In the process of plasma figure correction for a quartz sub-mirror, the plasma parallel removal process and ink masking layer are combined for the first time.
Xiang Wu   +6 more
doaj   +1 more source

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